106-759: The Texas Campaign was the first front in the Mexican–American War , fought between the United States and Mexico . The front started with a Mexican assault near Brownsville . US forces were forced to surrender after hours of resisting, which led President James K. Polk to declare war on Mexico. After the United States defeated a larger Mexican Army at Palo Alto and Resaca de la Palma, Mexican Forces led by Mariano Arista retreated out of Texas. Mexican%E2%80%93American War Mexican Cession The Mexican–American War , also known in
212-545: A choice. Indigenous soldiers who volunteered to fight with the Mexican Army were often abandoned and compensated unfairly. By raiding, indigenous populations were also able to acquire horses and properly tame them to move efficiently during battles. Captive-taking methods, especially that of the Comanche tribe, were also used to the advantage of the Mexican Army as captives would end up assisting indigenous populations in
318-618: A head in 1860 and 1861, when the governments of the southern states proclaimed their secession from the country and formed the Confederate States of America . The American Civil War led to the defeat of the Confederacy in 1865 and the eventual readmission of the states to the United States Congress . The cultural endeavor and pursuit of manifest destiny provided a strong impetus for westward expansion in
424-453: A large contingent of Irish- and German-born soldiers, nearly all European states and principalities were represented. It is estimated that the U.S. Army further included 1,500 men from British North America, including French Canadians. Although Polk hoped to avoid a protracted war over Texas, the extended conflict stretched regular army resources, necessitating the recruitment of volunteers with short-term enlistments. Some enlistments were for
530-449: A military that regularly intervened in politics, the U.S. generally kept its political divisions within the bounds of the institutions of governance. Since Mexico fought the war on its home territory, a traditional support system for troops were women, known as soldaderas . They did not participate in conventional fighting on battlefields, but some soldaderas joined the battle alongside the men. These women were involved in fighting during
636-462: A period of months, sometimes just weeks, or even days. Just before the outbreak of the war, liberal General José Joaquín de Herrera was president (December 1844 – December 1845) and willing to engage in talks so long as he did not appear to be caving to the U.S., but he was accused by many Mexican factions of selling out his country ( vendepatria ) for considering it. He was overthrown by Conservative Mariano Paredes (December 1845 – July 1846), who left
742-520: A policy of colonization to more effectively control the territory. After independence, the Mexican government implemented the policy, granting Moses Austin , a banker from Missouri, a large tract of land in Texas. Austin died before he could bring his plan of recruiting American settlers for the land to fruition, but his son, Stephen F. Austin , brought over 300 American families into Texas. This started
848-558: A republic in 1824. This government was characterized by instability, and it was ill-prepared for a major international conflict when war broke out with the U.S. in 1846. Mexico had successfully resisted Spanish attempts to reconquer its former colony in the 1820s and resisted the French in the so-called Pastry War of 1838 but the secessionists' success in Texas and the Yucatán against
954-663: A significant advantage over their Mexican counterparts, such as the Springfield 1841 rifle of the Mississippi Rifles and the Colt Paterson revolver of the Texas Rangers . In the later stages of the war, the U.S. Mounted Rifles were issued Colt Walker revolvers, of which the U.S. Army had ordered 1,000 in 1846. Most significantly, throughout the war, the superiority of the U.S. artillery often carried
1060-433: A sizable claim by Virginia. Of the three, only Connecticut seriously pursued its claims, while Virginia is considered to have had the most legitimate claim to the vast northwest, dividing it into counties and maintaining some limited control. The entirety of the new United States was claimed by Great Britain, including Machias Seal Island and North Rock , two small islands off the northeast coast which remain disputed up to
1166-610: A sovereign nation, deepened those sectional divisions. Polk had narrowly won the popular vote in the 1844 presidential election and decisively won the Electoral College, but with the annexation of Texas in 1845 and the outbreak of war in 1846, Polk's Democrats lost the House of Representatives to the Whig Party, which opposed the war. Unlike Mexico, which had weak formal state institutions, chaotic changes in government, and
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#17327917746831272-644: A sustained effort to acquire northern Mexican territory, with no success. Historian Peter Guardino states that in the war "the greatest advantage the United States had was its prosperity." With the Industrial Revolution across the Atlantic increasing the demand for cotton for textile factories, there was a large external market for cotton produced by enslaved African-American labor in the southern states. This demand helped fuel expansion into northern Mexico. Although there were political conflicts in
1378-553: A tripartite pact to settle the Oregon boundary dispute and provide for the cession of the port of San Francisco from Mexico. Lord Aberdeen declined to participate but said Britain had no objection to U.S. territorial acquisition there. The British minister in Mexico, Richard Pakenham , wrote in 1841 to Lord Palmerston urging "to establish an English population in the magnificent Territory of Upper California", saying that "no part of
1484-434: A year, but others were for 3 or 6 months. The best volunteers signed up for a year's service in the summer of 1846, with their enlistments expiring just when General Winfield Scott 's campaign was poised to capture Mexico City. Many did not re-enlist, deciding that they would rather return home than place themselves in harm's way of disease, threat of death or injury on the battlefield, or in guerrilla warfare. Their patriotism
1590-588: The American Civil War . Many officers who had trained at West Point gained experience in the war and later played prominent leadership roles during the Civil War. In Mexico, the war worsened domestic political turmoil and led to a loss of national prestige, as it suffered large losses of life in both its military and civilian population, had its financial foundations undermined, and lost more than half of its territory. Mexico obtained independence from
1696-661: The California Battalion following the outbreak of the Bear Flag Revolt in Sonoma. In November 1845, Polk sent John Slidell , a secret representative, to Mexico City with an offer to the Mexican government of $ 25 million for the Rio Grande border in Texas and Mexico's provinces of Alta California and Santa Fe de Nuevo México. U.S. expansionists wanted California to thwart any British interests in
1802-780: The Lee Resolution , passed by the Second Continental Congress two days prior, the colonies resolved that they were free and independent states. The union was formalized in the Articles of Confederation , which came into force on March 1, 1781, after being ratified by all 13 states. Their independence was recognized by Great Britain in the Treaty of Paris of 1783, which concluded the American Revolutionary War . This effectively doubled
1908-685: The Northern Mariana Islands became a U.S. territory, the Marshall Islands , Federated States of Micronesia , and Palau emerged from the trust territory as independent nations. The last major international change was the acquisition in 1904, and return to Panama in 1979, of the Panama Canal Zone , an unincorporated US territory which controlled the Panama Canal . The final cession of formal control over
2014-620: The Public Land Strip , or sometimes "No Man's Land". Atafu , Birnie Island , Butaritari , Caroline Island , Fanning Island , Flint Island , Gardner Island , Canton Island , Kingman Reef , Manihiki , Marakei , Nukunono , Palmyra Atoll , Penrhyn , Pukapuka , Rakahanga , Swains Island , Sydney Island , Vostok Island , and Washington Island were all claimed under the Guano Islands Act . Many additional islands were listed as bonded on this date, but based on
2120-671: The Rio Grande (as by flooding), for the border to be altered to follow the new course. The sudden changes often created bancos (land surrounded by bends in the river that became segregated from either country by a cutoff, often due to rapid accretion or avulsion of the alluvial channel), especially in the Lower Rio Grande Valley. When these bancos are created, the International Boundary and Water Commission investigates if land previously belonging to
2226-475: The Spanish Empire with the Treaty of Córdoba in 1821 after a decade of conflict between the royal army and insurgents for independence, with no foreign intervention. The conflict ruined the silver-mining districts of Zacatecas and Guanajuato . Mexico began as a sovereign nation with its future financial stability from its main export destroyed. Mexico briefly experimented with monarchy , but became
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#17327917746832332-551: The Tennessee River ; it is unknown how official or strong these claims were, and they are not mapped as they are in conflict with the other Spanish claim involving the border of West Florida. The acquisition expanded the United States to the whole of the Mississippi River basin, but the extent of what constituted Louisiana in the south was disputed with Spain : the United States claimed the purchase included
2438-479: The Texian Army during the 1836 Texas Revolution . The Republic of Texas was de facto an independent country, but most of its Anglo-American citizens who had moved from the United States to Texas after 1822 wanted to be annexed by the United States. Sectional politics over slavery in the United States had previously prevented annexation because Texas would have been admitted as a slave state, upsetting
2544-476: The Treaty of Paris of 1898 had excluded these islands; the new treaty simply ceded "any and all islands belonging to the Philippine Archipelago". The United States recognized the sovereignty of Tuvalu over Funafuti , Nukufetau , Nukulaelae , and Niulakita . The Banco Convention of 1905 between the United States and Mexico allowed, in the event of sudden changes in the course of
2650-710: The annexation of Hawaii in 1898, after the overthrow of its government five years previously. Alaska , the last major acquisition in North America, was purchased from Russia in 1867. Support for the independence of Cuba from the Spanish Empire , and the sinking of the USS Maine , led to the Spanish–American War in 1898, in which the United States gained Puerto Rico , Guam , and the Philippines , and occupied Cuba for several years. American Samoa
2756-527: The 19th century. The United States began expanding beyond North America in 1856 with the passage of the Guano Islands Act , causing many small and uninhabited, but economically important, islands in the Caribbean Sea and the Pacific Ocean to be claimed. Most of these claims were eventually abandoned, largely because of competing claims from other countries. The Pacific expansion culminated in
2862-556: The Louisiana volunteers were there, a lawless drunken rabble. They had driven away the inhabitants, taken possession of their houses, and were emulating each other in making beasts of themselves." John L. O'Sullivan , a vocal proponent of Manifest Destiny, later recalled "The regulars regarded the volunteers with importance and contempt ... [The volunteers] robbed Mexicans of their cattle and corn, stole their fences for firewood, got drunk, and killed several inoffensive inhabitants of
2968-476: The Natives. In 1829, because of the large influx of American immigrants, the non-Hispanic outnumbered native Spanish speakers in Texas. President Vicente Guerrero , a hero of Mexican independence, moved to gain more control over Texas and its influx of non-Hispanic colonists from the southern U.S. and discourage further immigration by abolishing slavery in Mexico. The Mexican government also decided to reinstate
3074-598: The Nueces River, ready to take by force the disputed land. At the same time, President Polk wrote to the American consul in the Mexican territory of Alta California, disclaiming American ambitions in California but offering to support independence from Mexico or voluntary accession to the United States, and warning that the United States would oppose any European attempts to take over. To end another war scare with
3180-547: The Regular Army officers looked down on the volunteers, whose training was poor and whose behavior was undisciplined. (see below) On the West Coast, the U.S. Navy fielded a battalion of sailors, in an attempt to recapture Los Angeles . Although the U.S. Army and Navy were not large at the outbreak of the war, the officers were generally well trained and the numbers of enlisted men fairly large compared to Mexico's. At
3286-480: The Republic of Texas and the U.S. asserting it to be the Rio Grande and Mexico claiming it to be the more-northern Nueces River . Polk sent a diplomatic mission to Mexico in an attempt to buy the disputed territory, together with California and everything in between for $ 25 million (equivalent to $ 778 million in 2023), an offer the Mexican government refused. Polk then sent a group of 80 soldiers across
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3392-453: The Rio Grande boundary of Texas was omitted from the U.S. Congress's annexation resolution to help secure passage after the annexation treaty failed in the Senate. President Polk claimed the Rio Grande boundary, and when Mexico sent forces over the Rio Grande, this provoked a dispute. In July 1845, Polk sent General Zachary Taylor to Texas, and by October, Taylor commanded 3,500 Americans on
3498-807: The Texians in the Battle of the Alamo , he was defeated by the Texian Army commanded by General Sam Houston and was captured at the Battle of San Jacinto . In exchange for his life Santa Anna signed a treaty with Texas President David Burnet ending the war and recognizing Texian independence. The treaty was not ratified by the Mexican Congress as it had been signed by a captive under duress. Although Mexico refused to recognize Texian independence, Texas consolidated its status as an independent republic and received official recognition from Britain, France, and
3604-522: The Treaties of Velasco made after Texans captured General Santa Ana after the Battle of San Jacinto, the southern border of Texas was placed at the "Rio Grande del Norte." The Texans claimed this placed the southern border at the modern Rio Grande . The Mexican government disputed this placement on two grounds: first, it rejected the idea of Texas independence; and second, it claimed that the Rio Grande in
3710-619: The U.S. Some of the boundary issues between the U.S. and Spain were resolved with the Adams-Onís Treaty of 1818. U.S. negotiator John Quincy Adams wanted clear possession of East Florida and establishment of U.S. claims above the 42nd parallel, while Spain sought to limit U.S. expansion into what is now the American Southwest . The U.S. sought to purchase territory from Mexico, starting in 1825, in order to settle some of these issues. U.S. President Andrew Jackson made
3816-464: The U.S. to settle debts, saying: "As to Texas, I regard it as of very little value compared with California, the richest, the most beautiful, and the healthiest country in the world ... with the acquisition of Upper California we should have the same ascendency on the Pacific ;... France and England both have had their eyes upon it." U.S. President John Tyler 's administration suggested
3922-568: The U.S., they were largely contained by the framework of the constitution and did not result in revolution or rebellion by 1846, but rather by sectional political conflicts. Northerners in the U.S. sought to develop the country's existing resources and expand the industrial sector without expanding the nation's territory. The existing balance of sectional interests would be disrupted by the expansion of slavery into new territory. The Democratic Party , to which President Polk belonged, in particular strongly supported expansion. Neither colonial Mexico nor
4028-601: The Union . In 1912, Arizona was the last state established in the contiguous United States , commonly called the "lower 48". In 1959, Hawaii was the 50th and most recent state admitted. The capital was not specifically established; at the time, the Continental Congress met in Philadelphia . Many states had vaguely defined and surveyed borders; these are not noted as contested in the maps unless there
4134-627: The United Kingdom on the other, was clarified by the treaty. In 1816, construction began on an unnamed fort nicknamed " Fort Blunder " on a peninsula in Lake Champlain that, while south of the surveyed border, was discovered to be north of 45° north , which was the border set by the Treaty of Paris and thus in British territory. Consequently, construction on the fort was abandoned. The Webster–Ashburton Treaty specified that section of
4240-694: The United Kingdom over the Oregon Country , Polk signed the Oregon Treaty dividing the territory, angering Northern Democrats who felt he was prioritizing Southern expansion over Northern expansion. In the winter of 1845–46, the federally commissioned explorer John C. Frémont and a group of armed men appeared in Alta California. After telling both the Mexican governor and the American Consul Thomas O. Larkin that he
4346-589: The United States as the Mexican War , and in Mexico as the United States intervention in Mexico , was an invasion of Mexico by the United States Army from 1846 to 1848. It followed the 1845 American annexation of Texas , which Mexico still considered its territory because it refused to recognize the Treaties of Velasco , signed by President Antonio López de Santa Anna after he was captured by
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4452-427: The United States, which all advised Mexico not to try to reconquer the new nation. Most Texians wanted to join the United States, but the annexation of Texas was contentious in the U.S. Congress, where Whigs and Abolitionists were largely opposed. In 1845, Texas agreed to the offer of annexation by the U.S. Congress and became the 28th state on December 29, 1845, which set the stage for the conflict with Mexico. By
4558-457: The World offering greater natural advantages for the establishment of an English colony ... by all means desirable ... that California, once ceasing to belong to Mexico, should not fall into the hands of any power but England ... there is some reason to believe that daring and adventurous speculators in the United States have already turned their thoughts in this direction." By the time
4664-569: The area and to gain a port on the Pacific Ocean. Polk authorized Slidell to forgive the $ 3 million owed to U.S. citizens for damages caused by the Mexican War of Independence and pay another $ 25 to $ 30 million for the two territories. Mexico was neither inclined nor able to negotiate. In 1846 alone, the presidency changed hands four times, the war ministry six times, and the finance ministry sixteen times. Despite that, Mexican public opinion and all political factions agreed that selling
4770-486: The army did their best to train the rough men who volunteered, but they could do little to inspire them with patriotism for the glorious country they were honored to serve." According to the leading Mexican conservative politician, Lucas Alamán , the "money spent on arming Mexican troops merely enabled them to fight each other and 'give the illusion' that the country possessed an army for its defense." However, an officer criticized Santa Anna's training of troops, "The cavalry
4876-408: The balance of power between Northern free states and Southern slave states. In the 1844 United States presidential election , Democrat James K. Polk was elected on a platform of expanding U.S. territory to Oregon , California (also a Mexican territory), and Texas by any means, with the 1845 annexation of Texas furthering that goal. However, the boundary between Texas and Mexico was disputed, with
4982-556: The battlefield, negotiating peace was a politically fraught issue. Some Mexican factions refused to consider any recognition of its loss of territory. Although Polk formally relieved his peace envoy, Nicholas Trist , of his post as negotiator, Trist ignored the order and successfully concluded the 1848 Treaty of Guadalupe Hidalgo . It ended the war, and Mexico recognized the cession of present-day Texas, California, Nevada, and Utah as well as parts of present-day Arizona, Colorado, New Mexico, and Wyoming. The U.S. agreed to pay $ 15 million for
5088-438: The battles of Palo Alto and Resaca-de-la-Palma, General Taylor had a small army, but it was composed exclusively of regular troops, under the best of drill and discipline. Every officer, from the highest to the lowest, was educated in his profession, not at West Point necessarily, but in the camp, in garrison, and many of them in wars with Natives. The rank and file were probably inferior, as material out of which to make an army, to
5194-468: The beginning of the war, Mexican forces were divided between the permanent forces ( permanentes ) and the active militiamen ( activos ). The permanent forces consisted of 12 regiments of infantry (of two battalions each), three brigades of artillery, eight regiments of cavalry, one separate squadron and a brigade of dragoons. The militia amounted to nine infantry and six cavalry regiments. In the northern territories, presidial companies ( presidiales ) protected
5300-550: The beginning of the war, the U.S. Army had eight regiments of infantry (three battalions each), four artillery regiments and three mounted regiments (two dragoons, one of mounted rifles). These regiments were supplemented by 10 new regiments (nine of infantry and one of cavalry) raised for one year of service by the act of Congress from February 11, 1847. A large portion of this fighting force consisted of recent immigrants. According to Tyler V. Johnson, foreign-born men amounted to 47 percent of General Taylor's total forces. In addition to
5406-410: The border was to follow the surveyed line, rather than the exact parallel, thus moving the fort's area into the United States, and a new fort, Fort Montgomery , would be built on the spot in 1844. As the earlier line was surveyed, even though it did not match the definition, it was deemed to be the legitimate border. The treaty was vague on which strait should be the border between Vancouver Island and
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#17327917746835512-481: The capital to sort out the political mess. Santa Anna briefly held the presidency again, from March 21, 1847 – April 2, 1847. His troops were deprived of support that would allow them to continue the fight. The conservatives demanded the removal of Gómez Farías, and this was accomplished by abolishing the office of vice president. Santa Anna returned to the field, replaced in the presidency by Pedro María de Anaya (April 2 – May 20, 1847). Santa Anna returned to
5618-532: The casualties, monetary cost, and heavy-handedness. The question of how to treat the new acquisitions intensified the debate over slavery in the United States. Although the Wilmot Proviso that explicitly forbade the extension of slavery into conquered Mexican territory was not adopted by Congress, debates about it heightened sectional tensions. Some scholars see the Mexican–American War as leading to
5724-473: The centralist government of Mexico showed its political weakness as the government changed hands multiple times. The Mexican military and the Catholic Church in Mexico , both privileged institutions with conservative political views, were stronger politically than the Mexican state. The United States' 1803 Louisiana Purchase resulted in an undefined border between Spanish colonial territories and
5830-683: The continent, thus causing a dispute over ownership of the San Juan Islands . It specified "through the middle of the said channel and of Fuca Straits, to the Pacific Ocean". A small strip between the Texas Panhandle and Kansas Territory was unclaimed because it fell south of Kansas Territory's border but north of 36°30′ north , which had been established in the Missouri Compromise as the northern limit of slavery, and thus Texas could not have it. This became known as
5936-462: The coordinates they were either phantoms or duplicates. In addition, Sarah Ann Island was claimed, which may have existed and would be sighted as late as 1917, but has since disappeared. Dakota Territory was organized from Nebraska Territory and the unorganized territory north of it. Nebraska Territory's western border was moved to 33° west from Washington, gaining small portions of Utah Territory and Washington Territory . Nevada Territory
6042-450: The country to acquire livestock for their own use and to supply an expanding market in Texas and the U.S. The northern area of Mexico was sparsely settled because of its challenging climate and topography. Mostly high desert with scarce rainfall, it supported little sedentary agriculture during the pre-Hispanic and colonial periods. After independence, Mexico became preoccupied with internal struggles that sometimes verged on civil war, and
6148-661: The country's territory, although the southeastern border with Spanish Florida was the subject of much dispute until it and Spanish claims to the Oregon Country were ceded to the US in 1821. The Oregon Country gave the United States access to the Pacific Ocean , though it was shared for a time with the United Kingdom . The annexation of the Republic of Texas in 1845 led directly to the Mexican–American War , after which
6254-454: The day. In his 1885 memoirs, former U.S. President Ulysses Grant , a veteran of the Mexican war, attributed Mexico's defeat to the poor quality of their army, writing: "The Mexican army of that day was hardly an organization. The private soldier was picked from the lower class of the inhabitants when wanted; his consent was not asked; he was poorly clothed, worse fed, and seldom paid. He was turned adrift when no longer wanted. The officers of
6360-425: The defense of Mexico City and Monterrey. Some women such as Doña Jesús Dosamantes and María Josefa Zozaya would be remembered as heroes. On the other hand, some Mexican women were seen as "angels" as they provided aid and comfort to the injured men on both sides. Although soldaderas were able to prove the abilities Mexican women had outside of the private sphere, Mexican women on the home front still contributed to
6466-506: The depredations of Micheltorena's army. Former Governor Alvarado organized a revolt in 1845, which culminated in the Battle of Providencia in Cahuenga Pass near Los Angeles. As a result of the actions of pioneer California rancher John Marsh , Micheltorena's forces were defeated. In 1800, Spain's colonial province of Texas (Tejas) had few inhabitants, with only about 7,000 non-native settlers. The Spanish crown developed
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#17327917746836572-495: The disputed territory to the Rio Grande, ignoring Mexican demands to withdraw. Mexican forces interpreted this as an attack and repelled the U.S. forces on April 25, 1846, a move which Polk used to convince the Congress of the United States to declare war. Beyond the disputed area of Texas, U.S. forces quickly occupied the regional capital of Santa Fe de Nuevo México along the upper Rio Grande. U.S. forces also moved against
6678-461: The federal system, replacing it with a unitary central government that removed power from the states. Leaving politics to those in Mexico City, General Santa Anna led the Mexican army to quash the semi-independence of Texas. He had done that in Coahuila (in 1824, Mexico had merged Texas and Coahuila into the enormous state of Coahuila y Tejas ). Austin called Texians to arms and they declared independence from Mexico in 1836. After Santa Anna defeated
6784-399: The full extent of the British colony. However, the British-American treaty granted the extension of West Florida to the United States, where it enlarged Georgia south to 31° north , indicating that only the original definition of West Florida was to be ceded to Spain. The local Spanish governors also made a move to occupy forts along the Mississippi River , with claims to everything south of
6890-472: The letter reached London, though, Sir Robert Peel 's Tory government, with its Little England policy, had come to power and rejected the proposal as expensive and a potential source of conflict. Pío Pico , the last governor of Alta California, advocated that California achieve independence from Mexico and become a British protectorate . In 1842, Mexico forcibly replaced California Governor Juan Bautista Alvarado with Manuel Micheltorena . Micheltorena
6996-484: The lower grades were but little superior to the men. With all this I have seen as brave stands made by some of these men as I have ever seen made by soldiers. Now Mexico has a standing army larger than the United States. They have a military school modeled after West Point. Their officers are educated and, no doubt, very brave. The Mexican war of 1846–48 would be an impossibility in this generation." There were significant political divisions in Mexico which seriously impeded
7102-447: The newly sovereign Mexican state effectively controlled Mexico's far north and west. Mexico's military and diplomatic capabilities declined after it attained independence from Spain in 1821 and left the northern half of the country vulnerable to attacks by Comanche , Apache , and Navajo Native Americans. The Comanche, in particular, took advantage of the weakness of the Mexican state to undertake large-scale raids hundreds of miles into
7208-491: The outbreak of the war, New Mexico was economically dependent on trade with the United States via the eastern branch of the Santa Fe Trail . The Mexican government's policy of allowing the settlement of U.S. citizens in its province of Tejas was aimed at expanding control into Comanche lands, the Comancheria . However, rather than settling in the dangerous central and western parts of the province, Anglos preferred to settle in East Texas with its rich farmland contiguous with
7314-400: The part of West Florida west of the Perdido River , whereas Spain claimed it ended at the western border of West Florida; and the southwestern border with New Spain was disputed , as the United States claimed the Sabine River as the border, but Spain maintained it was the Calcasieu River and others. [REDACTED] The border between New York and Vermont on the one side, and
7420-405: The physical damage of the war and assumed $ 3.25 million of debt already owed by the Mexican government to U.S. citizens. Mexico relinquished its claims on Texas and accepted the Rio Grande as its northern border with the United States. The victory and territorial expansion Polk envisioned inspired patriotism among some sections of the United States, but the war and treaty drew fierce criticism for
7526-423: The present. [REDACTED] [REDACTED] [REDACTED] Because of ambiguities and poor knowledge of geography, the treaty was unclear in several areas: The Peace of Paris also involved treaties with France and Spain , with Great Britain ceding the Floridas to Spain . During their ownership of West Florida , the British had moved its border north, and the cession to Spain appeared to apply to
7632-466: The presidency on May 20, 1847, when Anaya left to fight the invasion, serving until September 15, 1847. Preferring the battlefield to administration, Santa Anna left office again, leaving the office to Manuel de la Peña y Peña (September 16 – November 13, 1847). With U.S. forces occupying the Mexican capital and much of the heartland, negotiating a peace treaty was an exigent matter, and Peña y Peña left office to do that. Pedro María Anaya returned to
7738-518: The presidency on November 13, 1847 – January 8, 1848. Anaya refused to sign any treaty that ceded land to the U.S., despite the situation on the ground with Americans occupying the capital. Peña y Peña resumed the presidency January 8, 1848 – June 3, 1848, during which time the Treaty of Guadalupe Hidalgo was signed, bringing the war to an end. Polk had pledged to seek expanded territory in Oregon and Texas, as part of his campaign in 1844 , but
7844-460: The presidency to fight the invading U.S. Army and was replaced by his vice president Nicolás Bravo (July 28, 1846 – August 4, 1846). The conservative Bravo was overthrown by federalist liberals who re-established the federal Constitution of 1824 . José Mariano Salas (August 6, 1846 – December 23, 1846) served as president and held elections under the restored federalist system. General Antonio López de Santa Anna won those elections, but as
7950-460: The property tax and increase tariffs on shipped American goods. The settlers and many Mexican businessmen in the region rejected the demands, which led to Mexico closing Texas to additional immigration, which continued from the United States into Texas illegally. In 1834, Mexican conservatives seized the political initiative, and General Antonio López de Santa Anna became the centralist president of Mexico. The conservative-dominated Congress abandoned
8056-519: The province of Alta California and then turned south. The Pacific Squadron of the U.S. Navy blockaded the Pacific coast in the lower Baja California Territory . The U.S. Army, under Major General Winfield Scott , invaded the Mexican heartland via an amphibious landing at the port of Veracruz on March 9 and captured the capital, Mexico City , in September 1847. Although Mexico was defeated on
8162-557: The raids of American forces. The Mexican army was using surplus British muskets (such as the Brown Bess ), left over from the Napoleonic Wars . While at the beginning of the war most American soldiers were still equipped with the very similar Springfield 1816 flintlock muskets, more reliable caplock models became increasingly popular as the conflict progressed. Some U.S. troops carried more modern weapons that gave them
8268-411: The ranching industry that was a mainstay of the northern economy. As a result, the demoralized civilian population of northern Mexico put up little resistance to the invading U.S. army. Furthermore, distance and hostile activity by Native Americans made communications and trade between the heartland of Mexico and provinces such as Alta California and New Mexico increasingly difficult. As a result, at
8374-604: The region was made to Panama in 1999. States have generally retained their initial borders once established. Only three states ( Kentucky , Maine , and West Virginia ) have been created directly from area belonging to another state (although at the time of admission, Vermont agreed to a monetary payment for New York to relinquish its claim); all of the other states were created from federal territories or from acquisitions. Four states ( Louisiana , Missouri , Nevada , and Pennsylvania ) have expanded substantially by acquiring additional federal territory after their initial admission to
8480-452: The regular army was not sufficiently large to sustain extended conflicts on two fronts. The Oregon dispute with Britain was settled peaceably by treaty, allowing U.S. forces to concentrate on the southern border. The war was fought by regiments of regulars bolstered by various regiments, battalions, and companies of volunteers from the different states of the Union, as well as Americans and some Mexicans in California and New Mexico. In general,
8586-531: The scattered settlements. Indigenous populations in Mexico played a crucial role in the defending their land. By the beginning of the war, indigenous populations were depleted of their natural resources due to an influx of American settlers . As a result, indigenous populations from the Great Plains region had to rely on raiding American camps in order to survive. Although raiding was much more lucrative than hunting, indigenous population did not have much of
8692-568: The size of the colonies, now able to stretch west past the Proclamation Line to the Mississippi River . This land was organized into territories and then states, though there remained some conflict with the sea-to-sea grants claimed by some of the original colonies. In time, these grants were ceded to the federal government. The first great expansion of the country came with the Louisiana Purchase of 1803, which doubled
8798-687: The southern U.S. slave states . As settlers poured in from the U.S., the Mexican government discouraged further migration with its 1829 abolition of slavery. During the Spanish colonial era, the Californias (i.e., the Baja California peninsula and Alta California) were sparsely settled. After Mexico became independent, it shut down the missions and reduced its military presence. In 1842, the U.S. minister in Mexico, Waddy Thompson Jr. , suggested Mexico might be willing to cede Alta California to
8904-597: The steady trend of migration from the United States into the Texas frontier. Austin's colony was the most successful of several colonies authorized by the Mexican government. The Mexican government intended the new settlers to act as a buffer between the Tejano residents and the Comanches, but the non-Hispanic colonists tended to settle in areas with decent farmland and trade connections with Louisiana rather than farther west where they would have been an effective buffer against
9010-492: The territories to the United States would tarnish the national honor. Mexicans who opposed direct conflict with the United States, including President José Joaquín de Herrera , were viewed as traitors. Military opponents of de Herrera, supported by populist newspapers, considered Slidell's presence in Mexico City an insult. When de Herrera considered receiving Slidell to settle the problem of Texas annexation peacefully, he
9116-630: The town in the streets." Many of the volunteers were unwanted and considered poor soldiers. The expression "Just like Gaines's army" came to refer to something useless, the phrase having originated when a group of untrained and unwilling Louisiana troops was rejected and sent back by General Taylor at the beginning of the war. In his 1885 memoirs, Ulysses Grant assesses the U.S. armed forces facing Mexico more favorably. The victories in Mexico were, in every instance, over vastly superior numbers. There were two reasons for this. Both General Scott and General Taylor had such armies as are not often got together. At
9222-481: The treaty was actually the Nueces River , since the current Rio Grande has always been called "Rio Bravo" in Mexico. The latter claim belied the full name of the river in Mexico, however: "Rio Bravo del Norte." The ill-fated Texan Santa Fe Expedition of 1841 attempted to realize the claim to New Mexican territory east of the Rio Grande, but its members were captured by the Mexican Army and imprisoned. Reference to
9328-402: The victorious United States obtained the northern half of Mexico 's territory, including what was quickly made the state of California . As the development of the country moved west, however, the question of slavery became more important, with vigorous debate over whether the new territories would allow slavery and events such as the Missouri Compromise and Bleeding Kansas . This came to
9434-537: The volunteers that participated in all the later battles of the war; but they were brave men, and then drill and discipline brought out all there was in them. A better army, man for man, probably never faced an enemy than the one commanded by General Taylor in the earliest two engagements of the Mexican war. The volunteers who followed were of better material, but without drill or discipline at the start. They were associated with so many disciplined men and professionally educated officers, that when they went into engagements it
9540-433: The war effort. Inside Mexico, the conservative centralistas and liberal federalists vied for power, and at times these two factions inside Mexico's military fought each other rather than the invading U.S. Army. Santa Anna bitterly remarked, "However shameful it may be to admit this, we have brought this disgraceful tragedy upon ourselves through our interminable in-fighting." During the conflict, presidents held office for
9646-597: The war effort. After having to face the losses in their country, Mexican women were seen dressed in black and creating somber paintings. American and Mexican women shared the similarities of providing their domestic services on the battlefield. Among the most notable American women on the battlefield was Sarah Bowman . She was often seen delivering food, carrying wounded soldiers, and in close combat. In Mexico While their husbands enlisted, many American women stayed in Mexico to tend to oversee their business, making themselves factory women. However, factory woman Ann Chase
9752-577: The war, including Anne Royall , Jane Swisshelm , and Jane Cazneau . Female American journalists played a crucial role in representing the voices of women that had been silenced within the public sphere. Territorial evolution of the United States The United States of America was formed after thirteen British colonies in North America declared independence from the British Empire on July 4, 1776. In
9858-507: The worsening situation on the northern frontier was largely neglected. In northern Mexico, the end of Spanish rule was marked by the end of financing for garrisoned presidios and the pay-offs to Native Americans to maintain peace. In the absence of effective governance, Comanche and Apache took to raiding for livestock and looted much of the northern countryside outside of the scattered towns. The raids after 1821 resulted in many deaths, halted most transportation and communications, and decimated
9964-454: Was accused of treason and deposed. After a more nationalistic government under General Mariano Paredes y Arrillaga came to power, it publicly reaffirmed Mexico's claim to Texas. The Mexican Army was a weak and divided force. Only 7 of the 19 states that formed the Mexican federation sent soldiers, armament, and money for the war effort. Many leaders expressed their concern for the country, including Santa Anna who stated that , "The leaders of
10070-658: Was acquired by the United States in 1900 after the end of the Second Samoan Civil War . The United States purchased the U.S. Virgin Islands from Denmark in 1917. Puerto Rico and Guam remain territories, and the Philippines became independent in 1946, after being a major theater of World War II . Following the war, many islands were entrusted to the U.S. by the United Nations , and while
10176-480: Was an active dispute. The borders of North Carolina were particularly poorly surveyed, its border with South Carolina having been done in several pieces, none of which truly matched the spirit of the charter, and its border with Virginia was only surveyed roughly halfway inland from the sea. Several northeastern states had overlapping claims: Connecticut, Massachusetts Bay, and New York all claimed land west of their accepted borders, overlapping with each other and with
10282-431: Was doubted by some in the U.S., but they were not counted as deserters. The volunteers were far less disciplined than the regular army, with many committing attacks on the civilian population, sometimes stemming from anti-Catholic and anti-Mexican racial bias. Soldiers' memoirs describe cases of looting and murder of Mexican civilians, mostly by volunteers. One officer's diary records: "We reached Burrita about 5 pm, many of
10388-464: Was drilled only in regiments. The artillery hardly ever maneuvered and never fired a blank shot. The general in command was never present on the field of maneuvers, so that he was unable to appreciate the respective qualities of the various bodies under his command ... If any meetings of the principal commanding officers were held to discuss the operations of the campaign, it was not known, nor was it known whether any plan of campaign had been formed." At
10494-496: Was erroneously left behind on the western side of Wyoming Territory. The North-Western Territory was transferred by the United Kingdom to Canada , thus transferring its portion of the Alaska boundary dispute . On this same date several islands, Cagayan de Sulu and Sibutu among them, were purchased from Spain and assigned to the Philippines, which was then being governed as a U.S. insular area . The borders specified in
10600-630: Was his practice, he left the administration to his vice president, who was again liberal Valentín Gómez Farías (December 23, 1846 – March 21, 1847). In February 1847, conservatives rebelled against the liberal government's attempt to take Church property to fund the war effort. In the Revolt of the Polkos , the Catholic Church and conservatives paid soldiers to rise against the liberal government. Santa Anna had to leave his campaign to return to
10706-610: Was merely buying supplies on the way to Oregon, he instead went to the populated area of California and visited Santa Cruz and the Salinas Valley , explaining he had been looking for a seaside home for his mother. Mexican authorities became alarmed and ordered him to leave. Frémont responded by building a fort on Gavilan Peak and raising the American flag. Larkin sent word that Frémont's actions were counterproductive. Frémont left California in March but returned and took control of
10812-484: Was organized from Utah Territory west of 39° west from Washington . North Carolina proclaimed its secession from the Union, withdrawing from Congress. Caroline Island was claimed by the United Kingdom . Wyoming Territory was organized from portions of Dakota , Idaho , and Utah Territories. The territory would remain under the jurisdiction of the Dakota Territory until its own government
10918-409: Was organized on May 19, 1869. The act organizing Wyoming Territory became law on this date, but it is unclear if the territory could be considered "organized" until May 19, 1869, as the act specifies it was not to take effect until a government is organized; however, all sources use this date as the creation, and most use it for the organization, of the territory. A tiny portion of the Dakota Territory
11024-521: Was sent up from lower Mexico, along with an army, that had largely been recruited from Mexico's worst jails. The Californios resented this, partly because California had previously been governed by native-born Californios, partly because Micheltorena's policies were unpopular, and also because the soldiers in Micheltorena's army got a reputation for spending much of their time stealing the local Californios' chickens. Women were not considered safe from
11130-459: Was willing enough to become a spy for U.S. forces in order to protect her home and business in the absence of her husband. In the U.S. Similarly to the Mexican women were contributed to the war efforts from their homes, women in the U.S. also protested publicly and made patriotic crafts that U.S. soldiers could carry. In addition, female journalists across multiple states took advantage of their literacy to speak up in support or in opposition of
11236-477: Was with a confidence they would not have felt otherwise. They became soldiers themselves almost at once. All these conditions we would enjoy again in case of war. The U.S. had been an independent country since the American Revolution , but it was a country that was strongly divided along sectional lines, especially in regard to slavery. Enlarging the country, particularly through armed combat against
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