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139-399: The municipality has a territory of 579.7 km (223.8 sq mi), with a population of 17,458, as of December 2009. More significant tourist sights in the area include the early Byzantine cave monasteries around the villages of Balik and Brestnitsa dating to the 5th-6th century. Tervel Municipality includes the following 26 places; all of them are villages: The municipality has

278-462: A sensational victory against Bulgaria and the Kievan Rus' in 971. John in particular was an astute administrator who reformed military structures and implemented effective fiscal policies. After John's death, Constantine VII's grandsons Basil II and Constantine VIII ruled jointly for half a century, although the latter exercised no real power before Basil's death in 1025. Their early reign

417-702: A Turkish attack against Iconium with a counterattack, but was then defeated and captured by the Seljuks. Despite this success, Alp Arslan quickly sought a peace treaty with the Byzantines, signed in 1069; he saw the Fatimids in Egypt as his main enemy and had no desire to be diverted by unnecessary hostilities. In February 1071, Romanos sent envoys to Arslan to renew the 1069 treaty; keen to secure his northern flank against attack, to which Arslan agreed. Abandoning

556-467: A combination of external threats and internal instabilities caused the Roman state to splinter as regional armies acclaimed their generals as "soldier-emperors". One of these, Diocletian ( r.  284–305 ), seeing that the state was too big to be ruled by one man, attempted to fix the problem by instituting a Tetrarchy , or rule of four, and dividing the empire into eastern and western halves. Although

695-645: A considerable increase in the size of urban settlements, together with a notable upsurge in new towns. Trade was also flourishing; the Venetians, the Genoese and others opened up the ports of the Aegean to commerce, shipping goods from the Crusader states and Fatimid Egypt to the west and trading with the empire via Constantinople. Manuel's death on 24 September 1180 left his 11-year-old son Alexios II Komnenos on

834-464: A contested legacy to Roman identity and to associate negative connotations from ancient Latin literature. The adjective "Byzantine", which derived from Byzantion (Latinised as Byzantium ), the name of the Greek settlement Constantinople was established on, was only used to describe the inhabitants of that city; it did not refer to the empire, which they called Romanía —"Romanland". After

973-516: A desire to see if the Empire's struggles could present new opportunities. In hindsight, both Byzantine and modern historians are unanimous in dating the decline of Byzantine fortunes to this battle. As Paul K. Davis writes, "Byzantine defeat severely limited the power of the Byzantines by denying them control over Anatolia, the major recruiting ground for soldiers. Henceforth, the Muslims controlled

1112-542: A distinction between the earlier Roman Empire and the later Byzantine Empire . During the earlier Pax Romana period, the western parts of the empire became increasingly Latinised , while the eastern parts largely retained their preexisting Hellenistic culture . This created a dichotomy between the Greek East and Latin West . These cultural spheres continued to diverge after Constantine I ( r.  324–337 ) moved

1251-403: A few men in the rout of his wing. The Seljuks did not pursue the fleeing Byzantines, nor did they recapture Manzikert itself at this point. The Byzantine army regrouped and marched to Dokeia , where they were joined by Romanos when he was released a week later. The most serious material loss was the emperor's extravagant baggage train. The result of this disastrous defeat was, in simplest terms,

1390-542: A large number in Venice. According to chronicler Niketas Choniates , a prostitute was even set up on the patriarchal throne. When order had been restored, the crusaders and the Venetians proceeded to implement their agreement; Baldwin of Flanders was elected emperor of a new Latin Empire , and the Venetian Thomas Morosini was chosen as patriarch. The lands divided up among the leaders included most of

1529-512: A lengthy conflict against Sasanid Persia and ended in 363 with the death of his son-in-law Julian . The short Valentinianic dynasty , occupied with wars against barbarians , religious debates, and anti-corruption campaigns, ended in the East with the death of Valens at the Battle of Adrianople in 378. Valens's successor, Theodosius I ( r.  379–395 ), restored political stability in

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1668-651: A line through the Adriatic Sea and south to Cyrene, Libya . This encompassed most of the Balkans , all of modern Greece, Turkey, Syria , Palestine ; North Africa, primarily with modern Egypt and Libya ; the Aegean islands along with Crete , Cyprus and Sicily , and a small settlement in Crimea . The landscape of the Empire was defined by the fertile fields of Anatolia , long mountain ranges and rivers such as

1807-469: A mixed population consisting mostly of Turks (40.60% according to 2011 census data), Bulgarians (37.06%) and Romani (11.12%). The following table shows the change of the population during the last four decades. According to the latest Bulgarian census of 2011, the religious composition, among those who answered the optional question on religious identification, was the following: Byzantine Empire The Byzantine Empire , also referred to as

1946-692: A result "the Empire ;... would never recover." In the aftermath of the battle, Norman soldiers who had served in the Byzantine armies spread tales about the defeat and likely inspired an episode in the Chanson de Roland in which the amirant of Babylon, Baligant , fights Charlemagne and is defeated only through the aid of Saint Gabriel . The battle is described in the novel The Lady For Ransom by Alfred Duggan . The largest mosque in Turkey,

2085-450: A small fleet of 100 ships to defend the capital, but other than that he was indifferent to the populace. He was finally overthrown when Isaac II Angelos , surviving an imperial assassination attempt, seized power with the aid of the people and had Andronikos killed. The reign of Isaac II, and more so that of his brother Alexios III , saw the collapse of what remained of the centralised machinery of Byzantine government and defence. Although

2224-417: A speedy and marked improvement. Gradually, however, Andronikos's reign deteriorated. The aristocrats were infuriated against him, and to make matters worse, Andronikos seemed to have become increasingly unbalanced; executions and violence became increasingly common, and his reign turned into a reign of terror. Andronikos seemed almost to seek the extermination of the aristocracy as a whole. The struggle against

2363-487: A truce with the Seljuks that lasted until 1064, when a large Seljuk army under Alp Arslan attacked the theme of Iberia and took Ani ; after a siege of 25 days, they captured the city. In 1068, Romanos IV Diogenes took power and, after some speedy military reforms, appointed Manuel Komnenos (nephew of Isaac I Komnenos) to lead an expedition against the Seljuks. Manuel captured Hierapolis Bambyce in Syria , next thwarted

2502-517: A two-month siege on 29 May 1453. The final Byzantine emperor, Constantine XI Palaiologos , was last seen casting off his imperial regalia and throwing himself into hand-to-hand combat after the walls of the city were taken. The Empire was centred in what is now Greece and Turkey with Constantinople as its capital. In the 5th century, it controlled the eastern basis of the Mediterranean running east from Singidunum (modern Belgrade ) in

2641-541: Is evidence that some Komnenian heirs had set up a semi-independent state in Trebizond before 1204. According to the historian Alexander Vasiliev , "the dynasty of the Angeloi, Greek in its origin, ... accelerated the ruin of the Empire, already weakened without and disunited within." In 1198, Pope Innocent III broached the subject of a new crusade through legates and encyclical letters. The stated intent of

2780-547: Is impossible to precisely date the foundation of the Byzantine Empire. In a series of conflicts between the third and first centuries   BC, the Roman Republic gradually established hegemony over the eastern Mediterranean , while its government ultimately transformed into the one-person rule of an emperor . The Roman Empire enjoyed a period of relative stability until the third century AD , when

2919-449: Is no consensus on a "foundation date" for the Byzantine Empire, if there was one at all. The growth of the study of "late antiquity" has led to some historians setting a start date in the seventh or eighth centuries. Others believe a "new empire" began during changes in c.  300   AD. Still others hold that these starting points are too early or too late, and instead begin c.  500 . Geoffrey Greatrex believes that it

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3058-715: The Tactica , a military treatise; and the Book of the Eparch , which codified Constantinople's trading regulations. In non-literary contexts Leo was less successful: the empire lost in Sicily and against the Bulgarians , while he provoked theological scandal by marrying four times in an attempt to father a legitimate heir. The early reign of that heir, Constantine VII , was tumultuous, as his mother Zoe , his uncle Alexander ,

3197-618: The Byzantine army and the capture of the Emperor Romanos IV Diogenes played an important role in undermining Byzantine authority in Anatolia and Armenia , and allowed for the gradual Turkification of Anatolia. Many Turks, travelling westward during the 11th century, saw the victory at Manzikert as an entrance to Asia Minor. The brunt of the battle was borne by the Byzantine army's professional soldiers from

3336-536: The Catalan Company ravaging the countryside and increasing resentment towards Constantinople. The situation became worse for Byzantium during the civil wars after Andronikos III died. A six-year-long civil war devastated the empire, allowing the Serbian ruler Stefan Dušan to overrun most of the empire's remaining territory and establish a Serbian Empire . In 1354, an earthquake at Gallipoli devastated

3475-651: The Council of Clermont and urged all those present to take up arms under the sign of the Cross and launch an armed pilgrimage to recover Jerusalem and the East from the Muslims. The response in Western Europe was overwhelming. Alexios was able to recover a number of important cities, islands and much of western Asia Minor. The Crusaders agreed to become Alexios' vassals under the Treaty of Devol in 1108, which marked

3614-633: The Council of Piacenza in 1095, envoys from Alexios spoke to Pope Urban II about the suffering of the Christians of the East and underscored that without help from the West, they would continue to suffer under Muslim rule. Urban saw Alexios' request as a dual opportunity to cement Western Europe and reunite the Eastern Orthodox Church with the Roman Catholic Church under his rule. On 27 November 1095, Urban called

3753-475: The Danube , he pushed his troops too far in 602—they mutinied, proclaimed an officer named Phocas as emperor, and executed Maurice. The Sasanians seized their moment and reopened hostilities ; Phocas was unable to cope and soon faced a major rebellion led by Heraclius . Phocas lost Constantinople in 610 and was soon executed, but the destructive civil war accelerated the empire's decline. Under Khosrow II ,

3892-750: The Danube . In the north and west were the Balkans, the corridors between the mountain ranges of Pindos , the Dinaric Alps , the Rhodopes and the Balkans . In the south and east were Anatolia, the Pontic Mountains and the Taurus - Anti-Taurus range, which served as passages for armies, while the Caucasus mountains lay between the Empire and its eastern neighbours. Roman roads connected

4031-720: The Eastern Roman Empire , was the continuation of the Roman Empire centred in Constantinople during late antiquity and the Middle Ages . The eastern half of the Empire survived the conditions that caused the fall of the West in the 5th century AD, and continued to exist until the fall of Constantinople to the Ottoman Empire in 1453. During most of its existence, the empire remained

4170-636: The Empire of Trebizond , was created after Alexios I of Trebizond , commanding the Georgian expedition in Chaldia a few weeks before the sack of Constantinople, found himself de facto emperor and established himself in Trebizond. Of the three successor states, Epirus and Nicaea stood the best chance of reclaiming Constantinople. The Nicaean Empire struggled to survive the next few decades, however, and by

4309-641: The Komnenian restoration , and Constantinople would remain the largest and wealthiest city in Europe until the 13th century. The empire was largely dismantled in 1204, following the Sack of Constantinople by Latin armies at the end of the Fourth Crusade ; its former territories were then divided into competing Greek rump states and Latin realms . Despite the eventual recovery of Constantinople in 1261,

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4448-632: The Normans who arrived in Italy at the beginning of the 11th century. During a period of strife between Constantinople and Rome culminating in the East-West Schism of 1054 , the Normans advanced gradually into Byzantine Italy . Reggio , the capital of the tagma of Calabria, was captured in 1060 by Robert Guiscard , followed by Otranto in 1068. Bari , the main Byzantine stronghold in Apulia ,

4587-526: The Pechenegs , who were caught by surprise and annihilated at the Battle of Levounion on 28 April 1091. Having achieved stability in the West, Alexios could turn his attention to the severe economic difficulties and the disintegration of the empire's traditional defences. However, he still did not have enough manpower to recover the lost territories in Asia Minor and to the advance by the Seljuks. At

4726-633: The Renaissance . The fall of Constantinople is sometimes used to mark the dividing line between the Middle Ages and the early modern period . The inhabitants of the empire, now generally termed Byzantines, thought of themselves as Romans ( Romaioi ). Their Islamic neighbours similarly called their empire the "land of the Romans" ( Bilād al-Rūm ), but the people of medieval Western Europe preferred to call them "Greeks" ( Graeci ), due to having

4865-458: The Roman papacy . In 780, Empress Irene assumed power on behalf of her son Constantine VI . Although she was a capable administrator who temporarily resolved the iconoclasm controversy, the empire was destabilized by her feud with her son. The Bulgars and Abbasids meanwhile inflicted numerous defeats on the Byzantine armies, and the papacy crowned Charlemagne as Roman emperor in 800. In 802,

5004-677: The Umayyad Caliphate , but the empire subsequently stabilised under the Isaurian dynasty. The empire was able to expand once more under the Macedonian dynasty , experiencing a two-century-long renaissance . This came to an end in 1071, with the defeat by the Seljuk Turks at the Battle of Manzikert . Thereafter, periods of civil war and Seljuk incursion resulted in the loss of most of Asia Minor . The empire recovered during

5143-513: The sea walls of Constantinople , overhaul provincial governance, and wage inconclusive campaigns against the Abbasids. After his death, his empress Theodora , ruling on behalf of her son Michael III , permanently extinguished the iconoclastic movement; the empire prospered under their sometimes-fraught rule. However, Michael was posthumously vilified by historians loyal to the dynasty of his successor Basil I , who assassinated him in 867 and who

5282-457: The Çamlıca Mosque of Istanbul, has four minarets that span 107.1 metres (351 ft), a measurement that refers to the Battle of Manzikert (1071). In 2018, Turkey's ruling AKP announced their future agenda for 2023, 2053 and 2071 targets: 100th anniversary of the republic, 600th anniversary of conquest of Istanbul and 1000th anniversary of battle of Manzikert, respectively. Crusade of Kings ,

5421-641: The 532 Nika revolt he rebuilt much of Constantinople, including the original Hagia Sophia . Justinian took advantage of political instability in Italy to attempt the reconquest of lost western territories. The Vandal Kingdom in North Africa was subjugated in 534 by the general Belisarius , who then invaded Italy ; the Ostrogothic Kingdom was destroyed in 554. In the 540s, however, Justinian began to suffer reversals on multiple fronts. Taking advantage of Constantinople's preoccupation with

5560-513: The Arab efforts to capture Constantinople in the 670s , but suffered a reversal against the Bulgars , who soon established an empire in the northern Balkans . Nevertheless, he and Constans had done enough to secure the empire's position, especially as the Umayyad Caliphate was undergoing another civil war . Justinian II sought to build on the stability secured by his father Constantine but

5699-419: The Battle of Manzikert as a pivotal point in the decline of the Byzantine Empire. In both battles, separated by over a hundred years, a more elusive Seljuk opponent ambushed a large Byzantine army. However, the implications of Myriocephalum were initially limited, thanks to Manuel I Komnenos ' holding on to power. The same could not be said of Romanos, whose enemies "martyred a courageous and upright man," and as

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5838-408: The Byzantine administration's policy of heavy taxation and abolishing of the levy. The weakening of Georgia and Armenia played a significant role in the Byzantine defeat at Manzikert in 1071. Basil II is considered among the most capable Byzantine emperors and his reign as the apex of the empire in the Middle Ages . By 1025, the date of Basil II's death, the Byzantine Empire stretched from Armenia in

5977-485: The Byzantines were not invincible. The usurpation by Andronikos Doukas also politically destabilized the empire, and it was difficult to organize resistance to the Turkic migrations that followed the battle. Finally, while intrigue and the deposition of emperors had taken place before, Romanos' fate was particularly horrific, and the destabilization caused by it also rippled through the empire for centuries. What followed

6116-475: The Egyptian Sea [Mediterranean Sea]. Years and decades later, Manzikert came to be seen as a disaster for the Empire; thus, later sources greatly exaggerated the number of troops and casualties. Byzantine historians would often look back and lament the "disaster" of that day, pinpointing it as the moment the decline of the Empire began. It was not an immediate disaster, but the defeat showed the Seljuks that

6255-557: The Emperor) survived and took part in later events. The battle did not directly change the balance of power between the Byzantines and the Seljuks; however, the ensuing civil war within the Byzantine Empire did, to the advantage of the Seljuks. Doukas had escaped without casualties and quickly marched back to Constantinople, where he led a coup against Romanos and proclaimed his cousin Michael VII as basileus . Bryennios also lost

6394-589: The Empire by land, with the Via Egnatia running from Constantinople to the Albanian coast through Macedonia and the Via Traiana to Adrianople (modern Edirne ), Serdica (modern Sofia ) and Singidunum. By water, Crete, Cyprus and Sicily were key naval points and the main ports connecting Constantinople were Alexandria, Gaza, Caesarea and Antioch. The Aegean sea was considered an internal lake within

6533-432: The Empire. The emperor was the centre of the whole administration of the Empire, who the legal historian Kaius Tuori has said was "above the law, within the law, and the law itself"; with a power that is difficult to define and which does not align with our modern understanding of the separation of powers. The proclamations of the crowds of Constantinople, and the inaugurations of the patriarch from 457, would legitimise

6672-580: The Mongol invasion also gave Nicaea a temporary respite from Seljuk attacks, allowing it to concentrate on the Latin Empire to its north. The Empire of Nicaea, founded by the Laskarid dynasty , managed to recapture Constantinople in 1261 and defeat Epirus . This led to a short-lived revival of Byzantine fortunes under Michael VIII Palaiologos , but the war-ravaged empire was ill-equipped to deal with

6811-405: The Normans were driven out of Greece, in 1186 the Vlachs and Bulgars began a rebellion that led to the formation of the Second Bulgarian Empire . The internal policy of the Angeloi was characterised by the squandering of the public treasure and fiscal maladministration. Imperial authority was severely weakened, and the growing power vacuum at the centre of the empire encouraged fragmentation. There

6950-401: The Sassanids occupied the Levant and Egypt and pushed into Asia Minor, while Byzantine control of Italy slipped and the Avars and Slavs ran riot in the Balkans. Although Heraclius repelled a siege of Constantinople in 626 and defeated the Sassanids in 627, this was a pyrrhic victory . The early Muslim conquests soon saw the conquest of the Levant , Egypt , and the Sassanid Empire by

7089-405: The Seljuk Turks. It took three decades of internal strife before Alexius I (1081 to 1118) restored stability to Byzantium. Historian Thomas Asbridge says: "In 1071, the Seljuqs crushed an imperial army at the Battle of Manzikert (in eastern Asia Minor ), and though historians no longer consider this to have been an utterly cataclysmic reversal for the Greeks, it still was a stinging setback." It

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7228-429: The Seljuk positions, with the left wing under Bryennios, the right wing under Theodore Alyates , and the centre under the emperor. Andronikos Doukas led the reserve forces in the rear – a foolish mistake by the emperor, considering the dubious loyalties of the Doukas family. The Seljuks were organized into a crescent formation about four kilometres away. Seljuk horse archers attacked the Byzantines as they drew closer;

7367-414: The Seljuks responded with attacks by horse archers . The next day, some foraging parties under Bryennios discovered the main Seljuk force and were forced to retreat to Manzikert. Romanos sent the Armenian general Basilakes and some cavalry, as Romanos did not believe this was Alp Arslan's full army. The cavalry was routed, and Basilakes was taken prisoner. Romanos then drew his troops into formation and sent

7506-405: The Seljuks. Romanos was wounded and taken prisoner by the Seljuks. The survivors were many who fled the field and were pursued throughout the night, but not beyond that; by dawn, the professional core of the Byzantine army had been destroyed, while many of the peasant troops and levies who had been under the command of Andronikus had fled. When Romanos was conducted into the presence of Alp Arslan,

7645-402: The Sultan refused to believe that the bloodied and tattered man covered in dirt was the mighty Emperor of the Romans. After discovering his identity, Alp Arslan placed his boot on the Emperor's neck and forced him to kiss the ground, a traditional symbolic gesture at the time. Alp Arslan then treated Romanos with considerable kindness and again offered the terms of peace that he had offered before

7784-413: The Tetrarchy system quickly failed, the division of the empire proved an enduring concept. Constantine I ( r.  306–337 ) secured sole power in 324. Over the following six years, he rebuilt the city of Byzantium as a capital city , which was renamed Constantinople . Rome , the previous capital, was further from the important eastern provinces and in a less strategically important location; it

7923-426: The Turkish invaders at the Battle of Hyelion and Leimocheir , brought troops from the capital and was able to gather an army along the way, a sign that the Byzantine army remained strong and that the defensive program of western Asia Minor was still successful. John and Manuel pursued active military policies, and both deployed considerable resources on sieges and city defences; aggressive fortification policies were at

8062-443: The West saw Manzikert as a signal that Byzantium was no longer capable of being the protector of Eastern Christianity or of Christian pilgrims to the Holy Places in the Middle East . Delbrück considers the battle's importance exaggerated, but the evidence makes clear that it resulted in the Empire's inability to put an effective army into the field for many years. The Battle of Myriokephalon (or Myriocephalum) has been compared to

8201-486: The West, Khosrow I of the Sasanian Empire invaded Byzantine territory and sacked Antioch in 540. Meanwhile, the emperor's internal reforms and policies began to falter, not helped by a devastating plague that killed a large proportion of the population and severely weakened the empire's social and financial stability. The most difficult period of the Ostrogothic war, against their king Totila , came during this decade, while divisions among Justinian's advisors undercut

8340-401: The West. Zeno ( r.  474–491 ) convinced the problematic Ostrogoth king Theodoric to take control of Italy from Odoacer, which he did; dying with the empire at peace, Zeno was succeeded by Anastasius I ( r.  491–518 ). Although his Monophysitism brought occasional issues, Anastasius was a capable administrator and instituted several successful financial reforms including

8479-429: The Western provinces to achieve an economic revival that continued until the close of the century. It has been argued that Byzantium under the Komnenian rule was more prosperous than at any time since the Persian invasions of the 7th century. During the 12th century, population levels rose and extensive tracts of new agricultural land were brought into production. Archaeological evidence from both Europe and Asia Minor shows

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8618-522: The abolition of the chrysargyron tax . He was the first emperor to die with no serious problems affecting his empire since Diocletian. The reign of Justinian I was a watershed in Byzantine history. Following his accession in 527, the law-code was rewritten as the influential Corpus Juris Civilis and Justinian produced extensive legislation on provincial administration; he reasserted imperial control over religion and morality through purges of non-Christians and "deviants"; and having ruthlessly subdued

8757-441: The actual battle, wrote: ...the fortunes of the Roman Empire had sunk to their lowest ebb. For the armies of the East were dispersed in all directions, because the Turks had over-spread, and gained command of, countries between the Euxine Sea [ Black Sea ] and the Hellespont , and the Aegean Sea and Syrian Seas [ Mediterranean Sea ], and the various bays, especially those which wash Pamphylia , Cilicia , and empty themselves into

8896-401: The administration's response. He also did not fully heal the divisions in Chalcedonian Christianity , as the Second Council of Constantinople failed to make a real difference. Justinian died in 565; his reign saw more success than that of any other Byzantine emperor, yet he left his empire under massive strain. Financially and territorially overextended, Justin II ( r.  565–578 )

9035-568: The aristocracy turned into wholesale slaughter, while the emperor resorted to ever more ruthless measures to shore up his regime. Despite his military background, Andronikos failed to deal with Isaac Komnenos of Cyprus, Béla III of Hungary who reincorporated Croatian territories into Hungary, and Stephen Nemanja of Serbia who declared his independence from the Byzantine Empire. Yet, none of these troubles compared to William II of Sicily 's invasion force of 300 ships and 80,000 men, arriving in 1185 and sacking Thessalonica . Andronikos mobilised

9174-418: The battle as "the greatest disaster suffered by the Empire in its seven and a half centuries of existence". Sir Steven Runciman , in his "History of the Crusades", wrote that "the Battle of Manzikert was the most decisive disaster in Byzantine history. The Byzantines themselves had no illusions about it. Again and again, their historians refer to that dreadful day." Anna Komnene , writing a few decades after

9313-463: The battle was a chain of events – of which the battle was the first link – that undermined the Empire in the years to come. They included intrigues for the throne, the fate of Romanos, and Roussel de Bailleul 's attempting to carve himself an independent kingdom in Galatia with his 3,000 Frankish , Norman , and German mercenaries. He defeated the Emperor's uncle John Doukas , who had come to suppress him, advancing toward

9452-484: The battle. According to Ibn al-Adim , in the presence of Arslan, Romanos blamed the raids of Rashid al-Dawla Mahmud into Byzantine territory for his interventions in Muslim territories which eventually led to the Battle of Manzikert. Romanos remained a captive of the Sultan for a week. During this time, the Sultan allowed Romanos to eat at his table while concessions were agreed upon: Antioch, Edessa, Hierapolis, and Manzikert were to be surrendered. This would have left

9591-438: The boldness of the Armenian foot soldiers, he displayed great affection for them and promised them unheard-of rewards. In the end, the emperor's personal troops and these Armenian foot soldiers suffered the heaviest casualties in the Byzantine army. The left wing under Bryennios held out a little longer but was also soon routed. The remnants of the Byzantine centre, including the emperor and the Varangian Guard , were encircled by

9730-403: The capital to Constantinople and legalised Christianity . Under Theodosius I ( r. 379–395 ), Christianity became the state religion , and other religious practices were proscribed . Greek gradually replaced Latin for official use as Latin fell into disuse. The empire experienced several cycles of decline and recovery throughout its history, reaching its greatest extent after the fall of

9869-471: The capital to destroy Chrysopolis ( Üsküdar ) on the Asian coast of the Bosphorus. The Empire finally turned to the Seljuks to crush de Bailleul, which they did. However, the Turks ransomed him back to his wife, and it was only after the young general Alexios Komnenos pursued him that he was captured. These events all interacted to create a vacuum that the Turks filled. Their choice to establish their capital in Nikaea ( Iznik ) in 1077 could be explained by

10008-495: The capital, and Alexios Angelos was elevated to the throne as Alexios IV along with his blind father Isaac. Alexios IV and Isaac II were unable to keep their promises and were deposed by Alexios V . The crusaders again took the city on 13 April 1204 , and Constantinople was subjected to pillage and massacre by the rank and file for three days. Many priceless icons, relics and other objects later turned up in Western Europe ,

10147-503: The centre of their crescent continually moved backwards while the wings moved to surround the Byzantine troops. The Byzantines pressed on despite the arrow attacks and captured Alp Arslan's camp by the end of the afternoon. However, the right and left wings, where the arrows did most of their damage, almost broke up when individual units tried to force the Seljuks into a pitched battle; the Seljuk cavalry simply disengaged when challenged, in

10286-469: The city had collapsed so severely that it was now little more than a cluster of villages separated by fields. On 2 April 1453, Sultan Mehmed 's army of 80,000 men and large numbers of irregulars laid siege to the city. Despite a desperate last-ditch defence of the city by the massively outnumbered Christian forces (c. 7,000 men, 2,000 of whom were foreign), Constantinople finally fell to the Ottomans after

10425-454: The classic Parthian tactics of steppe warriors. With the Seljuks avoiding battle, Romanos was forced to order a withdrawal by nightfall. However, the right wing misunderstood the order, and Doukas deliberately ignored the emperor's order to cover the army's withdrawal and marched directly back to the Byzantine camp outside Manzikert. With the Byzantines thoroughly confused, the Seljuks seized the opportunity and attacked. The Byzantine right wing

10564-603: The crusade was to conquer Egypt , the centre of Muslim power in the Levant. The Crusader army arrived at Venice in the summer of 1202 and hired the Venetian fleet to transport them to Egypt. As a payment to the Venetians, they captured the (Christian) port of Zara in Dalmatia , which was a vassal city of Venice, it had rebelled and placed itself under Hungary's protection in 1186. Shortly afterward, Alexios IV Angelos , son of

10703-407: The decay of the Byzantine army. About 1053, Constantine IX disbanded what the 11th century Byzantine historian John Skylitzes called the "Iberian Army", which consisted of 50,000 men. Skylitzes' contemporaries, the former officials Michael Attaleiates and Kekaumenos , agree that by demobilizing these soldiers, Constantine did catastrophic harm to the empire's eastern defenses. Constantine made

10842-504: The deposed and blinded Emperor Isaac II, made contact with the Crusaders. Alexios offered to reunite the Byzantine church with Rome, pay the Crusaders 200,000 silver marks, join the crusade, and provide all the supplies they needed to reach Egypt. The crusaders arrived at Constantinople in the summer of 1203 and quickly attacked , starting a major fire that damaged large parts of the city, and briefly seized control. Alexios III fled from

10981-475: The east by allowing the Goths to settle in Roman territory; he also twice intervened in the western half, defeating the usurpers Magnus Maximus and Eugenius in 388 and 394 respectively. He actively condemned paganism , confirmed the primacy of Nicene Christianity over Arianism , and established Christianity as the Roman state religion . He was the last emperor to rule both the western and eastern halves of

11120-433: The east to Calabria in southern Italy in the west. Many successes had been achieved, ranging from the conquest of Bulgaria to the annexation of parts of Georgia and Armenia, and the reconquests of Crete , Cyprus , and the important city of Antioch . These were not temporary tactical gains but long-term reconquests. At the same time, Byzantium was faced with new enemies. Its provinces in southern Italy were threatened by

11259-496: The eastern and western tagmata , as large numbers of mercenaries and Anatolian levies fled early and survived the battle. The fallout from Manzikert was disastrous for the Byzantines, resulting in civil conflicts and an economic crisis that severely weakened the Byzantine Empire's ability to defend its borders adequately. This led to the mass movement of Turks into central Anatolia – by 1080, an area of 78,000 square kilometres (30,000 sq mi) had been gained by

11398-440: The eastern question and the persistent Turkic incursions and settlements with a decisive military victory. He understood that raising another army would be both difficult and expensive. The emperor attempted to recall Tarchaneiotes and his half of the forces, but they were no longer in the area. There were no engagements that day, but on 26 August, the Byzantine army gathered itself into a proper battle formation and began to march on

11537-537: The emperor's role as the leader of the Christian world, John marched into the Holy Land at the head of the combined forces of the empire and the Crusader states; yet despite his efforts in leading the campaign, his hopes were disappointed by the treachery of his Crusader allies. In 1142, John returned to press his claims to Antioch, but he died in the spring of 1143 following a hunting accident. John's chosen heir

11676-533: The empire's eastern defences. The emergency lent weight to the military aristocracy in Anatolia, who in 1068 secured the election of one of their own, Romanos Diogenes , as emperor. In the summer of 1071, Romanos undertook a massive eastern campaign to draw the Seljuks into a general engagement with the Byzantine army. At the Battle of Manzikert , Romanos suffered a surprise defeat against Sultan Alp Arslan and

11815-496: The empire's fall, early modern scholars referred to the empire by many names, including the "Empire of Constantinople", the "Empire of the Greeks", the "Eastern Empire", the "Late Empire", the "Low Empire", and the "Roman Empire". The increasing use of "Byzantine" and "Byzantine Empire" likely started with the 15th-century historian Laonikos Chalkokondyles , whose works were widely propagated, including by Hieronymus Wolf . "Byzantine"

11954-552: The empire, gaining only short-term success. To avoid another sacking of the capital by the Latins, he forced the Church to submit to Rome, again a temporary solution for which the peasantry hated Michael and Constantinople. The efforts of Andronikos II and later his grandson Andronikos III marked Byzantium's last genuine attempts to restoring the glory of the empire. However, the use of mercenaries by Andronikos II often backfired, with

12093-468: The empire; after his death, the West would be destabilised by a succession of "soldier-emperors", unlike the East, where administrators would continue to hold power. Theodosius II ( r.  408–450 ) largely left the rule of the east to officials such as Anthemius , who constructed the Theodosian Walls to defend Constantinople, now firmly entrenched as Rome's capital. Theodosius' reign

12232-469: The end of the Norman threat during Alexios' reign. Alexios's son John II Komnenos succeeded him in 1118 and ruled until 1143. John was a pious and dedicated emperor who was determined to undo the damage to the empire suffered at the Battle of Manzikert half a century earlier. Famed for his piety and his remarkably mild and just reign, John was an exceptional example of a moral ruler at a time when cruelty

12371-620: The enemies that surrounded it. To maintain his campaigns against the Latins, Michael pulled troops from Asia Minor and levied crippling taxes on the peasantry, causing much resentment. Massive construction projects were completed in Constantinople to repair the damage of the Fourth Crusade, but none of these initiatives were of any comfort to the farmers in Asia Minor suffering raids from Muslim ghazis. Rather than holding on to his possessions in Asia Minor, Michael chose to expand

12510-584: The former Byzantine possessions. Although Venice was more interested in commerce than conquering territory, it took key areas of Constantinople, and the Doge took the title of " Lord of a Quarter and Half a Quarter of the Roman Empire ". After the sack of Constantinople in 1204 by Latin crusaders, two Byzantine successor states were established: the Empire of Nicaea and the Despotate of Epirus . A third,

12649-554: The fort, allowing the Ottomans (who were hired as mercenaries during the civil war by John VI Kantakouzenos ) to establish themselves in Europe. By the time the Byzantine civil wars had ended, the Ottomans had defeated the Serbians and subjugated them as vassals. Following the Battle of Kosovo , much of the Balkans became dominated by the Ottomans. Constantinople by this stage was underpopulated and dilapidated. The population of

12788-488: The heart of their imperial military policies. Despite the defeat at Myriokephalon, the policies of Alexios, John and Manuel resulted in vast territorial gains, increased frontier stability in Asia Minor, and secured the stabilisation of the empire's European frontiers. From c.  1081 to c.  1180 , the Komnenian army assured the empire's security, enabling Byzantine civilisation to flourish. This allowed

12927-667: The later part of his reign, John focused his activities on the East, personally leading numerous campaigns against the Turks in Asia Minor. His campaigns fundamentally altered the balance of power in the East, forcing the Turks onto the defensive, while retaking many towns, fortresses, and cities across the peninsula for the Byzantines. He defeated the Danishmend Emirate of Melitene and reconquered all of Cilicia , while forcing Raymond of Poitiers , Prince of Antioch, to recognise Byzantine suzerainty. In an effort to demonstrate

13066-412: The left wing out under Bryennios, who was almost surrounded by the rapidly approaching Turks and forced to retreat. The Seljuk forces hid among the nearby hills for the night, making it nearly impossible for Romanos to counterattack. On 25 August, some of Romanos' Turkic mercenaries came into contact with their Seljuk kin and deserted. Romanos then rejected a Seljuk peace emissary. He wanted to settle

13205-472: The loss of the Eastern Roman Empire's Anatolian heartland. John Julius Norwich says in his trilogy on the Byzantine Empire that the defeat was "its death blow, though centuries remained before the remnant fell. The themes in Anatolia were literally the heart of the empire, and within decades after Manzikert, they were gone." In his smaller book, A Short History of Byzantium , Norwich describes

13344-414: The massacre that historians earlier presumed. Modern scholars estimate that Byzantine losses were relatively low, considering that many units survived the battle intact and were fighting elsewhere within a few months, and most Byzantine prisoners of war were later released. Certainly, all the commanders on the Byzantine side (Doukas, Tarchaneiotes, Bryennios, Theodore Alyates, de Bailleul , and, above all,

13483-418: The measures he took to reform the government of the empire have been praised by historians. According to the historian George Ostrogorsky , Andronikos was determined to root out corruption: under his rule, the sale of offices ceased; selection was based on merit, rather than favouritism; and officials were paid an adequate salary to reduce the temptation of bribery. In the provinces, Andronikos's reforms produced

13622-592: The mid-13th century it had lost much of southern Anatolia. The weakening of the Sultanate of Rûm following the Mongol invasion in 1242–1243 allowed many beyliks and ghazis to set up their own principalities in Anatolia, weakening the Byzantine hold on Asia Minor. Two centuries later, one of the Beys of these beyliks, Osman I , would establish the Ottoman Empire that would eventually conquer Constantinople. However,

13761-546: The most capable Byzantine emperors, withstood continued Arab attacks, civil unrest, and natural disasters, and reestablished the state as a major regional power. Leo's reign produced the Ecloga , a new code of law to succeed that of Justinian II, and continued to reform the "theme system" in order to lead offensive campaigns against the Muslims, culminating in a decisive victory in 740 . Constantine overcame an early civil war against his brother-in-law Artabasdos , made peace with

13900-496: The most powerful economic, cultural, and military force in the Mediterranean world . The term "Byzantine Empire" was only coined following the empire's demise; its citizens referred to the polity as the "Roman Empire" and to themselves as "Romans". Due to the imperial seat's move from Rome to Byzantium , the adoption of state Christianity , and the predominance of Greek instead of Latin , modern historians continue to make

14039-545: The nearby fortress of Khliat if possible. Alp Arslan was already in the area, however, with allies and 30,000 cavalry from Aleppo and Mosul . Alp Arslan 's scouts knew exactly where Romanos was, while Romanos was completely unaware of his opponent's movements. Romanos ordered his general Joseph Tarchaniotes to take some of the regular troops and the Varangians and accompany the Pechenegs and Franks to Khliat . At

14178-586: The new Abbasid Caliphate , campaigned successfully against the Bulgars, and continued to make administrative and military reforms. However, due to both emperors' support for the Byzantine Iconoclasm , which opposed the use of religious icons , they were later vilified by Byzantine historians; Constantine's reign also saw the loss of Ravenna to the Lombards , and the beginning of a split with

14317-466: The newly-formed Arabic Rashidun Caliphate . By Heraclius' death in 641, the empire had been severely reduced economically as well as territorially—the loss of the wealthy eastern provinces had deprived Constantinople of three-quarters of its revenue. The next seventy-five years are poorly documented. Arab raids into Asia Minor began almost immediately, and the Byzantines resorted to holding fortified centres and avoiding battle at all costs; although it

14456-569: The outset of his reign, Alexios faced a formidable attack from the Normans under Guiscard and his son Bohemund of Taranto , who captured Dyrrhachium and Corfu and laid siege to Larissa in Thessaly . Guiscard's death in 1085 temporarily eased the Norman problem. The following year, the Seljuq sultan died, and the sultanate was split due to internal rivalries. By his own efforts, Alexios defeated

14595-521: The patriarch Nicholas , the powerful Simeon I of Bulgaria , and other influential figures jockeyed for power. In 920, the admiral Romanos I used his fleet to secure power, crowning himself and demoting Constantine to the position of junior co-emperor. His reign, which brought peace with Bulgaria and successes in the east under the general John Kourkouas , was ended in 944 by the machinations of his sons, whom Constantine soon usurped in turn. Constantine's ineffectual sole rule has often been construed as

14734-410: The pope and Western Christian kingdoms, and he successfully handled the passage of the crusaders through his empire. In the East, Manuel suffered a major defeat in 1176 at the Battle of Myriokephalon against the Turks. These losses were quickly recovered, and in the following year Manuel's forces inflicted a defeat upon a force of "picked Turks". The Byzantine commander John Vatatzes , who destroyed

14873-605: The ports of southern Italy, he sent an expedition to Italy in 1155, but disputes within the coalition led to the eventual failure of the campaign. Despite this military setback, Manuel's armies successfully invaded the southern parts of the Kingdom of Hungary in 1167, defeating the Hungarians at the Battle of Sirmium . By 1168, nearly the whole of the eastern Adriatic coast lay in Manuel's hands. Manuel made several alliances with

15012-550: The private retinues and peasant levies of the border lords ( archontes ). Finally, the large and diverse host included 500 Frankish and Norman mercenaries under Roussel de Bailleul , some Turkic ( Uz and Pecheneg ) and Bulgarian mercenaries , infantry under the Duke of Antioch , a contingent of Georgian and Armenian troops and some (but not all) of the Varangian Guard to total around 40,000 men. The quantity of

15151-439: The provincial troops had declined in the years before Romanos, as the government diverted funding to mercenaries who were judged less likely to be involved in politics and could be disbanded after use to save money. The march across Asia Minor was long and difficult. Romanos brought a luxurious baggage train, which did not endear him to his troops. The local population also suffered plundering by his Frankish mercenaries, whom he

15290-441: The reconstituted empire would wield only regional power during its final two centuries of existence. Its remaining territories were progressively annexed by the Ottomans in perennial wars fought throughout the 14th and 15th centuries. The fall of Constantinople to the Ottomans in 1453 ultimately brought the empire to an end. Many refugees who had fled the city after its capture settled in Italy and throughout Europe, helping to ignite

15429-468: The region. The Byzantine Empire was limited to the area immediately around Constantinople, and the Byzantines were never again a serious military force." It is also seen as one of the root causes for the later Crusades , in that the First Crusade of 1095 was originally a western response to the Byzantine emperor's call for military assistance after the loss of Anatolia . From another perspective,

15568-453: The reputation of the Roman general. Either way, Romanos' army was reduced to less than half his planned 40,000 men. Alp Arslan summoned his army and delivered a speech while dressed in a white robe similar to an Islamic funeral shroud on the morning of the battle. This was an encouraging message that he was ready to die in battle. Romanos was unaware of the loss of Tarchaneiotes and continued to Manzikert, which he easily captured on 23 August;

15707-630: The rule of an emperor. The senate had its own identity but would become an extension of the emperor's court, becoming largely ceremonial. Battle of Manzikert Byzantine Empire Seljuk Empire The Battle of Manzikert or Malazgirt was fought between the Byzantine Empire and the Seljuk Empire on 26 August 1071 near Manzikert, theme of Iberia (modern Malazgirt in Muş Province, Turkey ). The decisive defeat of

15846-497: The same time, Romanos and the rest of the army marched to Manzikert. This split the forces into halves of about 20,000 men each. It is unknown what happened to the army sent off with Tarchaniotes – according to Islamic sources, Alp Arslan smashed this army, yet Roman sources make no mention of any such encounter, and Attaliates suggests that Tarchaniotes fled at the sight of the Seljuk Sultan – an unlikely event considering

15985-478: The siege of Edessa, he immediately led his army to attack the Fatimid-held Aleppo. However, the peace treaty had been a deliberate distraction: Romanos now led a large army into Armenia to recover the lost fortresses before the Seljuks had time to respond. Accompanying Romanos was Andronikos Doukas , son of his rival John Doukas . The army consisted of about 5,000 professional Byzantine troops from

16124-548: The throne. Alexios was highly incompetent in the office, and with his mother Maria of Antioch 's Frankish background, his regency was unpopular. Eventually, Andronikos I Komnenos , a grandson of Alexios I, overthrew Alexios II in a violent coup d'état . After eliminating his potential rivals, he had himself crowned as co-emperor in September 1183. He eliminated Alexios II and took his 12-year-old wife Agnes of France for himself. Andronikos began his reign well; in particular,

16263-442: The unpopular Irene was overthrown by Nikephoros I ; he reformed the empire's administration but died in battle against the Bulgars in 811. Military defeats and societal disorder, especially the resurgence of iconoclasm, characterised the next eighteen years. Stability was somewhat restored during the reign of Theophilos ( r.  829–842 ), who exploited economic growth to complete construction programs, including rebuilding

16402-733: The vital core of Anatolia untouched. A payment of 10 million gold pieces demanded by the Sultan as a ransom for Romanos was deemed as too high by the latter, so the Sultan reduced its short-term expense by asking for 1.5 million gold pieces as an initial payment instead, followed by an annual sum of 360,000 gold pieces. Plus, a marriage alliance was prepared between Alp Arslan's son and Romanos’ daughter. The Sultan then gave Romanos many presents and an escort of two emirs and one hundred Mamluks on his route to Constantinople. Shortly after his return to his subjects, Romanos found his rule in serious trouble. Despite attempts to raise loyal troops, he

16541-474: The west during the reign of Justinian I ( r. 527–565 ), who briefly reconquered much of Italy and the western Mediterranean coast . The appearance of plague and a devastating war with Persia exhausted the empire's resources; the early Muslim conquests that followed saw the loss of the empire's richest provinces— Egypt and Syria —to the Rashidun Caliphate . In 698, Africa was lost to

16680-463: The west, the warlord Odoacer deposed Romulus Augustulus in 476, killed his titular successor Julius Nepos in 480, and the office of western emperor was formally abolished. Through a combination of luck, cultural factors, and political decisions, the Eastern empire never suffered from rebellious barbarian vassals and was never ruled by barbarian warlords—the problems which ensured the downfall of

16819-402: The western provinces and probably about the same number from the eastern provinces. These included long established regular units ( Heteria , Scholai and Straelati ) of the central field army ( Tagmata ). Amongst the native Byzantine element of the army were provincial troops from both the eastern and western military themes . Under Doukas, the rear guard at Manzikert was largely made up of

16958-422: The zenith of Byzantine learning , but while several works were compiled, they were largely intended to legitimise and glorify the emperor's Macedonian dynasty . His son and successor died young; under two soldier-emperors, Nikephoros II ( r.  963–969 ) and John I Tzimiskes ( r.  969–976 ), the Roman army claimed numerous military successes, including the conquest of Cilicia and Antioch , and

17097-539: Was almost immediately routed , thinking they were betrayed either by the Armenians or the army's Turkish auxiliaries. Some authors suppose that Armenians were the first to flee, and they all managed to get away, while by contrast, the Turkish auxiliaries remained loyal to the end. Other sources suggest that Armenian infantry stoutly resisted and did not turn tail, not abandoning the emperor as many had. When Romanos saw

17236-604: Was besieged in August 1068 and fell in April 1071 . About 1053, Constantine IX disbanded what the historian John Skylitzes calls the "Iberian Army", which consisted of 50,000 men, and it was turned into a contemporary Drungary of the Watch . Two other knowledgeable contemporaries, the former officials Michael Attaleiates and Kekaumenos , agree with Skylitzes that by demobilising these soldiers, Constantine did catastrophic harm to

17375-560: Was captured. Alp Arslan treated him with respect and imposed no harsh terms on the Byzantines. In Constantinople a coup put in power Michael Doukas , who soon faced the opposition of Nikephoros Bryennios and Nikephoros III Botaneiates . By 1081, the Seljuks had expanded their rule over virtually the entire Anatolian plateau from Armenia in the east to Bithynia in the west, and had established their capital at Nicaea , just 90 kilometres (56 miles) from Constantinople. The Komnenian dynasty attained full power under Alexios I in 1081. From

17514-512: Was defeated three times in battle against the Doukas family and was deposed, blinded , and exiled to the island of Proti . He died soon after due to an infection caused by his brutal blinding. Romanos' final foray into the Anatolian heartland, which he had worked so hard to defend, was a public humiliation. While Manzikert was a long-term strategic catastrophe for Byzantium, it was by no means

17653-561: Was given credit for his predecessor's achievements. Basil I ( r.  867–886 ) continued Michael's policies. His armies campaigned with mixed results in Italy but defeated the Paulicians of Tephrike . His successor Leo VI ( r.  886–912 ) compiled and propagated a huge number of written works. These included the Basilika , a Greek translation of Justinian I's law-code which included over 100 new laws of Leo's devising;

17792-574: Was heading towards the Manzikert plain , chose the route of the Kocasu Stream flowing through Khnus as a route to meet its water needs, and the army manufactured the spears to be used in the war from the trees growing in Khnus and its surroundings. Thinking that Alp Arslan was either further away or not coming at all, Romanos marched towards Lake Van , expecting to retake Manzikert quickly and

17931-581: Was his fourth son, Manuel I Komnenos , who campaigned aggressively against his neighbours both in the west and east. In Palestine, Manuel allied with the Crusader Kingdom of Jerusalem and sent a large fleet to participate in a combined invasion of Fatimid Egypt . Manuel reinforced his position as overlord of the Crusader states, with his hegemony over Antioch and Jerusalem secured by agreement with Raynald , Prince of Antioch, and Amalric of Jerusalem . In an effort to restore Byzantine control over

18070-546: Was invaded annually, Anatolia avoided permanent Arab occupation. The outbreak of the First Fitna in 656 gave Byzantium breathing space, which it used wisely: some order was restored in the Balkans by Constans II ( r.  641–668 ), who began the administrative reorganisation known as the " theme system ", in which troops were allocated to defend specific provinces. With the help of the recently rediscovered Greek fire , Constantine IV ( r.  668–685 ) repelled

18209-564: Was marked by the theological dispute over Nestorianism , which was eventually deemed heretical , and by the formulation of the Codex Theodosianus law code. It also saw the arrival of Attila 's Huns , who ravaged the Balkans and exacted a massive tribute from the empire; Attila however switched his attention to the rapidly-deteriorating western empire , and his people fractured after his death in 453. After Leo I ( r.  457–474 ) failed in his 468 attempt to reconquer

18348-406: Was not esteemed by the "soldier-emperors" who ruled from the frontiers or by the empire's population who, having been granted citizenship , considered themselves "Roman". Constantine extensively reformed the empire's military and civil administration and instituted the gold solidus as a stable currency. He favoured Christianity , which he had converted to in 312. Constantine's dynasty fought

18487-484: Was obliged to dismiss. The expedition rested at Sebasteia on the river Halys , reaching Theodosiopolis in June 1071. Some of his generals suggested continuing the march into the Seljuk territory and catching Alp Arslan before he was ready. Others, including Nicephorus Bryennius , suggested they wait and fortify their position. It was decided to continue the march. Then they moved to Khnus city. The Byzantine army, which

18626-506: Was occupied by conflicts against two prominent generals, Bardas Skleros and Bardas Phokas , which ended in 989 with the former's death and the latter's submission. Between 1021 and 1022, following years of tensions, Basil II led a series of victorious campaigns against the Kingdom of Georgia , resulting in the annexation of several Georgian provinces to the empire. Basil's successors also annexed Bagratid Armenia in 1045. Importantly, both Georgia and Armenia were significantly weakened by

18765-494: Was overthrown in 695 after attempting to exact too much from his subjects; over the next twenty-two years, six more rebellions followed in an era of political instability . The reconstituted caliphate sought to break Byzantium by taking Constantinople, but the newly crowned Leo III managed to repel the 717–718 siege , the first major setback of the Muslim conquests. Leo and his son Constantine V ( r.  741–775 ), two of

18904-519: Was soon at war on many fronts. The Lombards , fearing the aggressive Avars , conquered much of northern Italy by 572. The Sasanian wars restarted that year, and continued until the emperor Maurice finally emerged victorious in 591; by that time, the Avars and Slavs had repeatedly invaded the Balkans , causing great instability. Maurice campaigned extensively in the region during the 590s, but although he managed to re-establish Byzantine control up to

19043-709: Was the norm. For this reason, he has been called the Byzantine Marcus Aurelius . During his twenty-five-year reign, John made alliances with the Holy Roman Empire in the West and decisively defeated the Pechenegs at the Battle of Beroia . He thwarted Hungarian and Serbian threats during the 1120s, and in 1130 he allied himself with Lothair III , the German Emperor against the Norman King Roger II of Sicily . In

19182-489: Was the only time a Byzantine emperor became the prisoner of a Muslim commander, and the first time since Valerian that a Roman emperor was captured alive by an enemy force. Although the Byzantine Empire had remained strong and powerful in the Middle Ages, it began to decline under the reign of the militarily incompetent Constantine IX Monomachos and again under Constantine X Doukas  – a brief two-year period of reform under Isaac I Komnenos merely delayed

19321-415: Was used adjectivally alongside terms such as "Empire of the Greeks" until the 19th century. It is now the primary term, used to refer to all aspects of the empire; some modern historians believe that, as an originally prejudicial and inaccurate term, it should not be used. As the historiographical periodizations of " Roman history ", " late antiquity ", and "Byzantine history" significantly overlap, there

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