Misplaced Pages

#197802

104-537: The Ho Chi Minh Trail ( Vietnamese : Đường mòn Hồ Chí Minh ), also called Annamite Range Trail ( Vietnamese : Đường Trường Sơn ) was a logistical network of roads and trails that ran from North Vietnam to South Vietnam through the kingdoms of Laos and Cambodia . The system provided support, in the form of manpower and materiel , to the Viet Cong (or "VC") and the People's Army of Vietnam (PAVN), during

208-476: A future offensive ". That future offensive was launched during the lunar new year Tết holiday of 1968, and to prepare for it, 200,000 PAVN troops, including seven infantry regiments and 20 independent battalions, made the trip south. Throughout the war, ground operations by conventional units were somewhat limited to brief incursions into border sanctuaries. One notable operation was Dewey Canyon which took place from 22 January to 18 March 1969 in I Corps. During

312-636: A minor syllable occurred). These fricatives were not present in Proto-Viet–Muong, as indicated by their absence in Mường , but were evidently present in the later Proto-Vietnamese stage. Subsequent loss of the minor-syllable prefixes phonemicized the fricatives. Ferlus 1992 proposes that originally there were both voiced and voiceless fricatives, corresponding to original voiced or voiceless stops, but Ferlus 2009 appears to have abandoned that hypothesis, suggesting that stops were softened and voiced at approximately

416-416: A "Binh Tram" provided the logistical necessities. Usually located one day's march from one another, communication-liaison units were responsible for providing food, housing, medical care and guides to the next way-station. By April 1965, command of the 559th Group devolved upon General Phan Trọng Tuệ, who assumed command of 24,000 men in six truck transportation battalions, two bicycle transportation battalions,

520-628: A SAM that far south during the conflict. PAVN responded to U.S. nighttime bombing by building the 1,000 kilometer-long Road K ("Green Road") from north of Lum Bum to lower Laos. During "Commando Hunt IV" (30 April–9 October 1971), U.S., South Vietnamese and Laotian forces began to feel the North Vietnamese reaction to General Lon Nol 's coup in Cambodia and the subsequent closure of the port of Sihanoukville to its supply shipments. As early as 1969 PAVN had begun its largest logistical effort of

624-513: A U.S. cross-border recon effort. On 18 October 1965, the first mission was launched "across the fence" into Laos by the Military Assistance Command, Vietnam Studies and Observations Group (MACV-SOG). This was the beginning of an ever-expanding reconnaissance effort by MACV-SOG that would continue until the operation was disbanded in 1972. Another weapon in the U.S. arsenal was unleashed upon the trail on 10 December 1965, when

728-717: A boat transportation battalion, eight engineer battalions, and 45 commo-liaison stations. The motto of the 559th became "Build roads to advance, fight the enemy to travel." There were nine Binh Trams between the dry season of 1967 to August 1968. An example is Binh Tram 31: They took responsibility from the Mu Gia Pass to Lum Bum (Route 128) and all the roads from Route 12 to Kontum , Route 129 from Ca Vat to Na Phi Lang. Within this BT there were: 25th and 27th Engineer Battalions; 101st and 53rd Truck Transport Battalions; 14th AAA Battalion; two infantry companies; 8th Guide Battalion (soldiers to take troops and trucks from one station to

832-465: A certain extent at least, our nighttime supply operations". The history claimed that allied aircraft destroyed some 4,000 trucks during the 1970–71 dry season, of which the C-130s alone destroyed 2,432 trucks. A Spectre countermeasure was unveiled on 29 March 1972, when a Spectre was shot down on a night mission by a surface-to-air SA-7 missile near Tchepone. This was the first U.S. aircraft shot down by

936-566: A computer monitor or keyboard cables with hidden wireless transmitters bugs built-in for eavesdropping on video and keylogging . In July 2014 it was reported that handheld shipping image scanners manufactured in China were found with pre-installed, weaponized malware which was capable of exfiltrating CRM data and financial data. These scanners are of the type used by many United States retailers and warehouses, as well as delivery services such as United Parcel Service and FedEx . The scanned data

1040-581: A fuse fired from a flare pistol. Fifty-six tests were conducted by October; 85% were judged to be successful. President Johnson then gave authorization for the program, which lasted until July 1972. Testing on the second operation, "Project Commando Lava", began on 17 May: scientists from Dow Chemical had created a chemical concoction that, when mixed with rainwater, destabilized the soil and created mud. The program drew enthusiasm from its military and civilian participants, who claimed that they were there to "make mud, not war." In some areas it worked, depending on

1144-495: A localized area. In different theaters of conflict: The term interdiction is also used in criminology and law enforcement , such as in the U.S. War on Drugs and in immigration . The term interdiction is also used by the NSA when an electronics shipment is secretly intercepted by an intelligence agency (domestic or foreign) for the purpose of implanting bugs before they reach their destination. According to Der Spiegel ,

SECTION 10

#1732765999198

1248-447: A main vowel component followed by a shorter semivowel offglide /j/ or /w/ . There are restrictions on the high offglides: /j/ cannot occur after a front vowel (i, ê, e) nucleus and /w/ cannot occur after a back vowel (u, ô, o) nucleus. The correspondence between the orthography and pronunciation is complicated. For example, the offglide /j/ is usually written as i ; however, it may also be represented with y . In addition, in

1352-431: A mutual policy of each ignoring the other, at least in the public eye. This did not prevent the North Vietnamese from violating Lao neutrality by protecting and expanding their supply conduit, and by supporting their Pathet Lao allies in their war against the central government. U.S. intervention came in the form of building and supporting a CIA -backed clandestine army in its fight with the communists and constant bombing of

1456-448: A paper published in 1856. Later, in 1920, French-Polish linguist Jean Przyluski found that Mường is more closely related to Vietnamese than other Mon–Khmer languages, and a Viet–Muong subgrouping was established, also including Thavung , Chut , Cuoi , etc. The term "Vietic" was proposed by Hayes (1992), who proposed to redefine Viet–Muong as referring to a subbranch of Vietic containing only Vietnamese and Mường . The term " Vietic "

1560-546: A process of tonogenesis , in which distinctions formerly expressed by final consonants became phonemic tonal distinctions when those consonants disappeared. These characteristics have become part of many of the genetically unrelated languages of Southeast Asia; for example, Tsat (a member of the Malayo-Polynesian group within Austronesian ), and Vietnamese each developed tones as a phonemic feature. After

1664-642: A representative on the Government Council for Nationalities, an advisory body of the Czech Government for matters of policy towards national minorities and their members. It also grants the community the right to use Vietnamese with public authorities and in courts anywhere in the country. Vietnamese is taught in schools and institutions outside of Vietnam, a large part contributed by its diaspora . In countries with Vietnamese-speaking communities Vietnamese language education largely serves as

1768-540: A role to link descendants of Vietnamese immigrants to their ancestral culture. In neighboring countries and vicinities near Vietnam such as Southern China, Cambodia, Laos, and Thailand, Vietnamese as a foreign language is largely due to trade, as well as recovery and growth of the Vietnamese economy. Since the 1980s, Vietnamese language schools ( trường Việt ngữ/ trường ngôn ngữ Tiếng Việt ) have been established for youth in many Vietnamese-speaking communities around

1872-519: A stage commonly termed Middle Vietnamese ( tiếng Việt trung đại ). The pronunciation of the "rime" of the syllable, i.e. all parts other than the initial consonant (optional /w/ glide, vowel nucleus, tone and final consonant), appears nearly identical between Middle Vietnamese and modern Hanoi pronunciation. On the other hand, the Middle Vietnamese pronunciation of the initial consonant differs greatly from all modern dialects, and in fact

1976-552: A third of the Vietnamese lexicon in all realms, and may account for as much as 60% of the vocabulary used in formal texts. Vietic languages were confined to the northern third of modern Vietnam until the "southward advance" ( Nam tiến ) from the late 15th century. The conquest of the ancient nation of Champa and the conquest of the Mekong Delta led to an expansion of the Vietnamese people and language, with distinctive local variations emerging. After France invaded Vietnam in

2080-527: Is also spoken by the Jing people traditionally residing on three islands (now joined to the mainland) off Dongxing in southern Guangxi Province , China . A large number of Vietnamese speakers also reside in neighboring countries of Cambodia and Laos . In the United States, Vietnamese is the sixth most spoken language , with over 1.5 million speakers, who are concentrated in a handful of states. It

2184-484: Is interception of an object prior to its arrival at the location where it is to be used in military, espionage, and law enforcement. In the military, interdiction is the act of delaying, disrupting, or destroying enemy forces or supplies en route to the battle area. A distinction is often made between strategic and tactical interdiction. The former refers to operations whose effects are broad and long-term; tactical operations are designed to affect events rapidly and in

SECTION 20

#1732765999198

2288-415: Is notated i or y (with the difference between the two often indicating differences in the quality or length of the preceding vowel), and after /ð/ and /β/ , where it is notated ĕ . This ĕ , and the /j/ it notated, have disappeared from the modern language. Note that b [ɓ] and p [p] never contrast in any position, suggesting that they are allophones. The language also has three clusters at

2392-534: Is often mistaken for a tilde in modern reproductions of early Vietnamese writing. As a result of emigration , Vietnamese speakers are also found in other parts of Southeast Asia , East Asia , North America , Europe , and Australia . Vietnamese has also been officially recognized as a minority language in the Czech Republic . As the national language, Vietnamese is the lingua franca in Vietnam. It

2496-640: Is often mistakenly thought as being an monosyllabic language, Vietnamese words typically consist of from one to many as eight individual morphemes or syllables; the majority of Vietnamese vocabulary are disyllabic and trisyllabic words. Vietnamese is written using the Vietnamese alphabet ( chữ Quốc ngữ ). The alphabet is based on the Latin script and was officially adopted in the early 20th century during French rule of Vietnam . It uses digraphs and diacritics to mark tones and some phonemes . Vietnamese

2600-443: Is pronounced with one of six inherent tones , centered on the main vowel or group of vowels. Tones differ in: Tone is indicated by diacritics written above or below the vowel (most of the tone diacritics appear above the vowel; except the nặng tone dot diacritic goes below the vowel). The six tones in the northern varieties (including Hanoi), with their self-referential Vietnamese names, are: Interdiction Interdiction

2704-410: Is significantly closer to the modern Saigon dialect than the modern Hanoi dialect. The following diagram shows the orthography and pronunciation of Middle Vietnamese: ^1 [p] occurs only at the end of a syllable. ^2 This letter, ⟨ ꞗ ⟩ , is no longer used. ^3 [j] does not occur at the beginning of a syllable, but can occur at the end of a syllable, where it

2808-408: Is the first language of the majority of the Vietnamese population, as well as a first or second language for the country's ethnic minority groups . In the Czech Republic , Vietnamese has been recognized as one of 14 minority languages, on the basis of communities that have resided in the country either traditionally or on a long-term basis. This status grants the Vietnamese community in the country

2912-653: Is the third-most spoken language in Texas and Washington; fourth-most in Georgia, Louisiana, and Virginia; and fifth-most in Arkansas and California. Vietnamese is the third most spoken language in Australia other than English, after Mandarin and Arabic. In France, it is the most spoken Asian language and the eighth most spoken immigrant language at home. Vietnamese is the sole official and national language of Vietnam. It

3016-413: Is used, among others, by Gérard Diffloth , with a slightly different proposal on subclassification, within which the term "Viet–Muong" refers to a lower subgrouping (within an eastern Vietic branch) consisting of Vietnamese dialects, Mường dialects, and Nguồn (of Quảng Bình Province ). Austroasiatic is believed to have dispersed around 2000 BC. The arrival of the agricultural Phùng Nguyên culture in

3120-446: Is written with two Chinese characters or in a composite character made of two different characters. This conveys the transformation of the Vietnamese lexicon from sesquisyllabic to fully monosyllabic under the pressure of Chinese linguistic influence, characterized by linguistic phenomena such as the reduction of minor syllables; loss of affixal morphology drifting towards analytical grammar; simplification of major syllable segments, and

3224-521: The 559th Transportation Group , headquartered at Na Kai, Houaphan province in northeast Laos close to the border. It was under the command of Colonel (later General) Võ Bẩm and established to improve and maintain a transportation system to supply the VC insurgency against the South Vietnamese government. Initially, the North Vietnamese effort concentrated on infiltration across and immediately below

Ho Chi Minh trail - Misplaced Pages Continue

3328-633: The First Indochina War , when there was a Viet Minh maritime logistics line called the "Route of Ho Chi Minh", and shortly after late 1960, as the present trail developed, Agence France-Presse (AFP) announced that a north–south trail had opened, and they named the corridor La Piste de Hồ Chí Minh , the 'Hồ Chí Minh Trail'. The trail ran mostly in Laos, and was called the Trường Sơn Strategic Supply Route (Đường Trường Sơn) by

3432-465: The Joint Chiefs of Staff . The area fell under the auspices of " Operation Tiger Hound ". Political considerations complicated aerial operations. But the seasonal monsoons that hindered communist supply operations in Laos also hampered the interdiction effort. These efforts were hindered by morning fog and overcast, and by the smoke and haze produced by the slash-and-burn agriculture practiced by

3536-988: The Mon–Khmer branch of the Austroasiatic language family (which also includes the Khmer language spoken in Cambodia , as well as various smaller and/or regional languages , such as the Munda and Khasi languages spoken in eastern India, and others in Laos , southern China and parts of Thailand). In 1850, British lawyer James Richardson Logan detected striking similarities between the Korku language in Central India and Vietnamese. He suggested that Korku , Mon , and Vietnamese were part of what he termed "Mon–Annam languages" in

3640-605: The Red River Delta at that time may correspond to the Vietic branch. This ancestral Vietic was typologically very different from later Vietnamese. It was polysyllabic, or rather sesquisyllabic , with roots consisting of a reduced syllable followed by a full syllable, and featured many consonant clusters. Both of these features are found elsewhere in Austroasiatic and in modern conservative Vietic languages south of

3744-666: The Vietnam War . Construction for the network began following the North Vietnamese invasion of Laos in July 1959. At the time it was believed to be the main supply route, however it later transpired that the Sihanouk Trail which ran through Cambodia was handling significantly more material. It was named by the U.S. after the North Vietnamese leader Hồ Chí Minh . The origin of the name is presumed to have come from

3848-556: The Vietnamese Demilitarized Zone (DMZ) that separated the two Vietnams. The 559th Group "flipped" its line of communications to the west side of the Trường Sơn mountains. By 1959, the 559th had 6,000 personnel in two regiments alone, the 70th and 71st, not including combat troops in security roles or North Vietnamese and Laotian civilian laborers. In the early days of the conflict the trail was used strictly for

3952-597: The Vietnamese orthography with the phonetic pronunciation to the right. Some consonant sounds are written with only one letter (like "p"), other consonant sounds are written with a digraph (like "ph"), and others are written with more than one letter or digraph (the velar stop is written variously as "c", "k", or "q"). In some cases, they are based on their Middle Vietnamese pronunciation; since that period, ph and kh (but not th ) have evolved from aspirated stops into fricatives (like Greek phi and chi ), while d and gi have collapsed and converged together (into /z/ in

4056-510: The communists , after the Vietnamese name for the Annamite Range , a major mountain range of central Vietnam. They further identified the trail as either West Trường Sơn (Laos) or East Trường Sơn (Vietnam). According to the U.S. National Security Agency 's official history of the war, the trail system was "one of the great achievements of military engineering of the 20th century". The trail was able to effectively supply troops fighting in

4160-520: The 470th, 471st, 472nd, 473rd, and the 571st. The group consisted of four truck transportation regiments, two petroleum pipeline regiments, three anti-aircraft artillery (AAA) regiments, eight engineer regiments, and the 968th Infantry Division. By the end of 1970 the 559th was running 27 "Binh Trams", which transported 40,000 tonnes of supplies with a 3.4% loss rate during the year. Colonel Quang and Major Phuoc would eventually build 5,000 km of pipeline and ship over 270,000 tonnes of petrol. Sections of

4264-565: The French colonial era. The following diagram shows the phonology of Proto–Viet–Muong (the nearest ancestor of Vietnamese and the closely related Mường language ), along with the outcomes in the modern language: ^1 According to Ferlus, * /tʃ/ and * /ʄ/ are not accepted by all researchers. Ferlus 1992 also had additional phonemes * /dʒ/ and * /ɕ/ . ^2 The fricatives indicated above in parentheses developed as allophones of stop consonants occurring between vowels (i.e. when

Ho Chi Minh trail - Misplaced Pages Continue

4368-650: The Laotian border along Route 9 and headed for the PAVN logistical center at Tchepone. " Operation Lam Son 719 ", the long-sought assault on the Ho Chi Minh Trail itself and the ultimate test of the U.S. policy of Vietnamization , had begun. Unfortunately for the South Vietnamese, U.S. ground troops were prohibited by law from participation in the incursion, and the U.S. was restricted to providing air support, artillery fire, and helicopter aviation units. At first

4472-542: The NSA's TAO group is able to divert shipping deliveries to its own "secret workshops" in a method called interdiction, where agents load malware onto the electronics or install malicious hardware that can give US intelligence agencies remote access. The report also indicates that the NSA, in collaboration with the CIA and FBI , routinely and secretly intercepts shipping deliveries for laptops or other computer accessories, such as

4576-516: The North Vietnamese with 1,000 km (600 mi) of passable roads within the corridor, at least 300 km (200 mi) of which were good enough for year-round use. In 1967 Senior Colonel (later General) Đồng Sỹ Nguyên assumed command of the 559th Group. In comparison to the above DIA estimate, by the end of the year the North Vietnamese had completed 2,959 km of vehicle capable roads, including 275 kilometers of main roads, 576 kilometers of bypasses, and 450 entry roads and storage areas. It

4680-727: The Red River Delta and into the adjacent uplands, possibly to escape Chinese encroachment. The oldest layer of loans from Chinese into northern Vietic (which would become the Viet–Muong subbranch) date from this period. The northern Vietic varieties thus became part of the Mainland Southeast Asia linguistic area , in which languages from genetically unrelated families converged toward characteristics such as isolating morphology and similar syllable structure. Many languages in this area, including Viet–Muong, underwent

4784-527: The Red River area. The language was non-tonal, but featured glottal stop and voiceless fricative codas. Borrowed vocabulary indicates early contact with speakers of Tai languages in the last millennium BC, which is consistent with genetic evidence from Dong Son culture sites. Extensive contact with Chinese began from the Han dynasty (2nd century BC). At this time, Vietic groups began to expand south from

4888-651: The U.S. command in Saigon estimated that communist supply requirements for their southern forces amounted to 234 tons of all supplies per day and that 195 tons were moving through Laos. U.S. Defense Intelligence Agency (DIA) analysts concluded that during the 1965 Laotian dry season the enemy was moving 30 trucks per day (90 tonnes) over the trail, far above the Saigon estimate. U.S. officials had only estimates of its enemy's capabilities; intelligence collection agencies often conflicted with each other. Thanks to improvements to

4992-502: The Vietnam War, since the PAVN abandoned its old hit-and-run tactics and launched a conventional counterattack. The PAVN first launched massed infantry attacks supported by armor and heavy artillery to crush ARVN positions on the flanks of the main advance. Coordinated anti-aircraft fire made tactical air support and resupply difficult and costly, with 108 helicopters shot down and 618 others damaged. PAVN forces began to squeeze in on

5096-462: The approaches to the A Shau Valley in South Vietnam. The plastic pipeline, equipped with numerous small pumping stations, managed to transfer diesel fuel, gasoline, and kerosene all through the same pipe. Due to the efforts of the PAVN 592nd Pipelaying Regiment, the number of pipelines entering Laos increased to six that year. The 559th Group, still under the command of General Đồng Sỹ Nguyên,

5200-472: The arrival of the morning waves of U.S. fighter bombers. By the last phase of "Commando Hunt" (October 1970 – April 1972), the average daily number of U.S. aircraft flying interdiction missions included 182 attack fighters, 13 fixed-wing gunships, and 21 B-52s. The North Vietnamese also responded to the American aerial threat by the increased use of heavy concentrations of anti-aircraft artillery. By 1968 this

5304-475: The beginning of syllables, which have since disappeared: Most of the unusual correspondences between spelling and modern pronunciation are explained by Middle Vietnamese. Note in particular: De Rhodes's orthography also made use of an apex diacritic, as in o᷄ and u᷄ , to indicate a final labial-velar nasal /ŋ͡m/ , an allophone of /ŋ/ that is peculiar to the Hanoi dialect to the present day. This diacritic

SECTION 50

#1732765999198

5408-613: The border, closely followed by their enemy. As a test of Vietnamization, "Lam Son 719" failed; half of the invasion force was lost during the operation. Vietnamese language Like many languages in Southeast Asia and East Asia , Vietnamese is highly analytic and is tonal . It has head-initial directionality, with subject–verb–object order and modifiers following the words they modify. It also uses noun classifiers . Its vocabulary has had significant influence from Middle Chinese and loanwords from French . Although it

5512-498: The change of suprasegment instruments. For example, the modern Vietnamese word "trời" (heaven) was read as *plời in Old/Ancient Vietnamese and as blời in Middle Vietnamese. The writing system used for Vietnamese is based closely on the system developed by Alexandre de Rhodes for his 1651 Dictionarium Annamiticum Lusitanum et Latinum . It reflects the pronunciation of the Vietnamese of Hanoi at that time,

5616-466: The daughter languages from distinctions in the initial and final consonants. Vietnamese tones developed as follows: Glottal-ending syllables ended with a glottal stop /ʔ/ , while fricative-ending syllables ended with /s/ or /h/ . Both types of syllables could co-occur with a resonant (e.g. /m/ or /n/ ). At some point, a tone split occurred, as in many other mainland Southeast Asian languages . Essentially, an allophonic distinction developed in

5720-442: The diphthongs [āj] and [āːj] the letters y and i also indicate the pronunciation of the main vowel: ay = ă + /j/ , ai = a + /j/ . Thus, tay "hand" is [tāj] while tai "ear" is [tāːj] . Similarly, u and o indicate different pronunciations of the main vowel: au = ă + /w/ , ao = a + /w/ . Thus, thau "brass" is [tʰāw] while thao "raw silk" is [tʰāːw] . The consonants that occur in Vietnamese are listed below in

5824-694: The end of 1968, bombing missions over southern Laos had climbed 300 percent, from 4,700 sorties in October to 12,800 in November. This round-the-clock aerial effort was directed by "Operation Igloo White", run out of Nakhon Phanom , Thailand. It was composed of three parts: strings of air-dropped acoustic and seismic sensors collected intelligence on the trail; computers at the Intelligence Collection Center (ICS) in Thailand collated

5928-522: The entire conflict. The Laotian towns of Attapeu and Salavan , at the foot of the Bolaven Plateau were seized by the PAVN during 1970, opening the length of the Kong River system into Cambodia. Hanoi also created the 470th Transportation Group to manage the flow of men and supplies to the new battlefields in Cambodia. This new "Liberation Route" turned west from the trail at Muong May, at

6032-436: The first B-52 Stratofortress bomber strike was conducted in Laos. A common historical perspective supports the efficacy of the campaigns (despite their failure to halt or slow infiltration), as they did restrict enemy materiel and manpower in Laos and Cambodia. This viewpoint pervaded some official U.S. government histories of the conflict. John Schlight said of the PAVN's logistical apparatus, "This sustained effort, requiring

6136-446: The first motor transport unit fielded by North Vietnamese to work the trail and the use of motor transport escalated. Two types of units served under the 559th Group: "Binh Trams" (BT) and commo-liaison units. A "Binh Tram" was the equivalent of a regimental logistical headquarters and was responsible for securing a particular section of the network. While separate units were tasked with security, engineering, and communications functions,

6240-428: The full-time activities of tens of thousands of soldiers, who might otherwise have been fighting in South Vietnam, seems proof positive that the bombing of the Ho Chi Minh Trail had disrupted the North Vietnamese war effort." Despite U.S. anti-infiltration efforts, the estimated number of PAVN infiltrators for 1966 was between 58,000 and 90,000 troops, including five full enemy regiments. A June 1966 DIA estimate credited

6344-681: The indigenous population. During 1968 the USAF undertook two experimental operations that it hoped would worsen the monsoons. "Project Popeye" was an attempt to indefinitely extend the rainy season over southeastern Laos by cloud seeding . Testing on the project began in September above the Kong River watershed that ran through the Steel Tiger and Tiger Hound areas. Clouds were seeded by air with silver iodide smoke and then activated by launching

SECTION 60

#1732765999198

6448-419: The infiltration of manpower. At the time, Hanoi could supply its southern allies much more efficiently by sea. In 1959 the North Vietnamese created Transportation Group 759, which was equipped with 20 steel-hulled vessels to carry out such infiltration. After the initiation of U.S. naval interdiction efforts in coastal waters, known as Operation Market Time , the trail had to do double duty. Materiel sent from

6552-466: The information and predicted convoy paths and speeds; and an airborne relay and control aircraft which received the signals from the sensors and routed aircraft to targets as directed by the ICS. This effort was supported by MACV-SOG recon teams, who, besides carrying out recon, wiretap, and bomb damage assessment missions for "Commando Hunt", also hand-placed sensors for "Igloo White". Personnel interdiction

6656-661: The last commo-liaison station in Laos or Cambodia was reached and the vehicles were unloaded. The supplies were then cached, loaded onto watercraft, or man-portered into South Vietnam. Due to the increased effectiveness of "Commando Hunt", North Vietnamese transportation units usually took to the roads only at dusk with traffic peaking in the early morning hours. As U.S. aircraft came on station, traffic would subside until just before dawn, when fixed-wing gunships and night bombers returned to their bases. The trucks then began rolling again, reaching another peak in traffic around 06:00 as drivers hurried to get into truck parks before sunrise and

6760-446: The late 19th century, French gradually replaced Literary Chinese as the official language in education and government. Vietnamese adopted many French terms, such as đầm ('dame', from madame ), ga ('train station', from gare ), sơ mi ('shirt', from chemise ), and búp bê ('doll', from poupée ), resulting in a language that was Austroasiatic but with major Sino-influences and some minor French influences from

6864-469: The main line of the ARVN advance. Although an airborne assault managed to seize Tchepone, it was a useless victory, as the South Vietnamese could only hold the town for a short period before being withdrawn due to attacks on the main column. The only way the invasion force managed to extricate itself from Laos was through the massive application of U.S. air support. By 25 March 1971, the last ARVN troops recrossed

6968-427: The main syllable). When a minor syllable occurred, the main syllable's initial consonant was intervocalic and as a result suffered lenition , becoming a voiced fricative. The minor syllables were eventually lost, but not until the tone split had occurred. As a result, words in modern Vietnamese with voiced fricatives occur in all six tones, and the tonal register reflects the voicing of the minor-syllable prefix and not

7072-448: The makeup of the soil. The chemicals were dropped by C-130A aircraft, but the overall effect on North Vietnamese interdiction was minimal and the experiment was cancelled. In December 1965 the USAF began its first Operation Ranch Hand defoliation missions against the trail in Laos using both Agent Blue and Agent Orange defoliants. More than 210 missions took place, spraying approximately 1.8 million litres of defoliants. Unlike Laos,

7176-668: The need to extend the pipeline at a much faster rate. The responsibility to build the pipeline fell to Lieutenant Colonel Phan Tu Quang, who became the first Chief of the Fuel Supply Department, and Major Mai Trong Phuoc, who was the Commander of Road Work Team 18, the secret name for the workers who built the pipeline. Early in 1969, the pipeline crossed the Lao frontier through the Mu Gia Pass and, by 1970, it reached

7280-546: The next); three stores companies; a communications company; a medical care unit; three teams of surgeons; a quarantine unit; and a workshop to repair trucks. The system developed into an intricate maze of 5.5-metre-wide (18 ft) dirt roads (paved with gravel and corduroyed in some areas), foot and bicycle paths and truck parks. There were numerous supply bunkers, storage areas, barracks, hospitals, and command and control facilities, all concealed from aerial observation by an intricate system of natural and man-made camouflage that

7384-497: The north and /j/ in the south). Not all dialects of Vietnamese have the same consonant in a given word (although all dialects use the same spelling in the written language). See the language variation section for further elaboration. Syllable-final orthographic ch and nh in Vietnamese has had different analyses. One analysis has final ch , nh as being phonemes /c/, /ɲ/ contrasting with syllable-final t , c /t/, /k/ and n , ng /n/, /ŋ/ and identifies final ch with

7488-487: The north was stored in caches in the border regions that were soon retitled "Base Areas" (BA), which, in turn, became sanctuaries for VC and PAVN forces seeking respite and resupply after conducting operations in South Vietnam. There were five large base areas in the panhandle of Laos (see map). BA 604 was the main logistical center during the war. From there, the coordination and distribution of men and supplies into South Vietnam's Military Region (MR) I and BAs further south

7592-418: The operation went well, with little resistance from the North Vietnamese. By early March 1971 the situation changed. Hanoi made the decision to stand and fight. It began to muster forces which would eventually number 60,000 PAVN troops as well as several thousand allied Pathet Lao troops and Lao irregulars, outnumbering the ARVN by almost three to one. The fighting in southeastern Laos was unlike any yet seen in

7696-639: The operation, the 9th Marine Regiment attempted to interdict PAVN activity in the Da Krong River and A Shau Valleys. Ground units briefly entered the border areas of Laos during fighting with elements of the PAVN 9th Regiment. In the wake of the Tet Offensive, the North Vietnamese expanded and modernized their logistical effort. The number of supply and maintenance personnel dropped, mainly due to increased use of motor and river transport and mechanized construction equipment. The CIA estimated during

7800-488: The pipeline were still in use in the 1990s. Trucked supplies traveled in convoys from North Vietnam in relays, with trucks shuttling from one way station to the next. The vehicles were then unloaded and reloaded onto "fresh" trucks at each station. If a truck was disabled or destroyed, it was replaced from the assets of the next northern station and so on until it was replaced by a new one in North Vietnam. Eventually,

7904-405: The plain-voiced stops became voiceless and the allotones became new phonemic tones. The implosive stops were unaffected, and in fact developed tonally as if they were unvoiced. (This behavior is common to all East Asian languages with implosive stops.) As noted above, Proto-Viet–Muong had sesquisyllabic words with an initial minor syllable (in addition to, and independent of, initial clusters in

8008-423: The rainy season. In 1961 U.S. intelligence analysts estimated that 5,843 enemy infiltrators (actually 4,000) had moved south on the trail; in 1962, 12,675 (actually 5,300); in 1963, 7,693 (actually 4,700); and in 1964, 12,424. The supply capacity of the trail reached 20 to 30 tonnes per day in 1964 and it was estimated by the U.S. that 12,000 (actually 9,000) PAVN soldiers had reached South Vietnam that year. By 1965

8112-606: The routes were known as the "Southward March", "Eastward March", "Westward March", and "Northward March". During the First Indochina War the Việt Minh maintained north–south communications and logistics by expanding on this system of trails and paths, and called the routes the "Trans-West Supply Line" (running in south Vietnam, Cambodia, and Thailand) and the "Trans-Indochina Link" (running in north Vietnam, Laos, and Thailand). In May 1958 PAVN and Pathet Lao forces seized

8216-546: The same except that ơ [əː] is of normal length while â [ə] is short – the same applies to the vowels long a [aː] and short ă [a] . The centering diphthongs are formed with only the three high vowels (i, ư, u). They are generally spelled as ia, ưa, ua when they end a word and are spelled iê, ươ, uô, respectively, when they are followed by a consonant. In addition to single vowels (or monophthongs ) and centering diphthongs, Vietnamese has closing diphthongs and triphthongs . The closing diphthongs and triphthongs consist of

8320-473: The same time, according to the following pattern: ^3 In Middle Vietnamese , the outcome of these sounds was written with a hooked b (ꞗ), representing a /β/ that was still distinct from v (then pronounced /w/ ). See below. ^4 It is unclear what this sound was. According to Ferlus 1992, in the Archaic Vietnamese period (c. 10th century AD, when Sino-Vietnamese vocabulary

8424-526: The south end of Laos, and paralleled the Kong River into Cambodia. Eventually this new route extended past Siem Prang and reached the Mekong River near Stung Treng . During 1971 PAVN took Paksong and advanced to Pakse , at the heart of the Bolaven Plateau region of Laos. The following year, Khong Sedone fell to the North Vietnamese. The PAVN continued a campaign to clear the eastern flank of

8528-573: The south, an unparalleled military feat, given it was the site of the single most intense air interdiction campaign in history. Parts of what became the trail had existed for centuries as primitive footpaths that enabled trade. The area through which the system meandered was among the most challenging in Southeast Asia: a sparsely populated region of rugged mountains 500–2,400 metres (1,500–8,000 ft) in elevation, triple-canopy jungle and dense tropical rainforests . Pre-First Indochina War,

8632-403: The southern panhandle was bombed in " Operation Steel Tiger ". By mid-year the number of sorties being flown had grown from 20 to 1,000 per month. In January 1965, the U.S. command in Saigon requested control over bombing operations in the areas of Laos adjacent to South Vietnam's five northernmost provinces, claiming that the area was part of the "extended battlefield". The request was granted by

8736-542: The split from Muong around the end of the first millennium AD, the following stages of Vietnamese are commonly identified: After expelling the Chinese at the beginning of the 10th century, the Ngô dynasty adopted Classical Chinese as the formal medium of government, scholarship and literature. With the dominance of Chinese came wholesale importation of Chinese vocabulary. The resulting Sino-Vietnamese vocabulary makes up about

8840-505: The syllable-initial ch /c/ . The other analysis has final ch and nh as predictable allophonic variants of the velar phonemes /k/ and /ŋ/ that occur after the upper front vowels i /i/ and ê /e/ ; although they also occur after a , but in such cases are believed to have resulted from an earlier e /ɛ/ which diphthongized to ai (cf. ach from aic , anh from aing ). (See Vietnamese phonology: Analysis of final ch , nh for further details.) Each Vietnamese syllable

8944-579: The tones, whereby the tones in syllables with voiced initials were pronounced differently from those with voiceless initials. (Approximately speaking, the voiced allotones were pronounced with additional breathy voice or creaky voice and with lowered pitch. The quality difference predominates in today's northern varieties, e.g. in Hanoi , while in the southern varieties the pitch difference predominates, as in Ho Chi Minh City .) Subsequent to this,

9048-810: The trail in Cambodia was not systematically targeted for defoliation, although more than ten missions were mounted against the Parrot's Beak area, spraying approximately 155,000 litres of Agent Orange. On the ground, the CIA and the RLA had initially been given the responsibility of stopping, slowing, or, at the very least, observing the enemy's infiltration effort. In Laos, the agency began Operation Pincushion in 1962 to accomplish that goal. The operation evolved into Operation Hardnose , in which CIA-backed Laotian irregular reconnaissance team operations took place. In October 1965, General Westmoreland received authorization to launch

9152-579: The trail system (including opening new routes that would connect to the Sihanouk Trail in Cambodia), the quantity of supplies transported during 1965 almost equaled the combined total for the previous five years. During the year interdiction of the system had become one of the top American priorities, but operations against it were complicated by the limited forces available at the time and Laos's ostensible neutrality. The intricacies of Laotian affairs, and U.S. and North Vietnamese interference in them, led to

9256-489: The trail that it had begun in 1968. By 1968, U.S. Special Forces camps at Khe Sanh and Khâm Đức, both of which were used by MACV-SOG as forward operations bases for its reconnaissance effort, had either been abandoned or overrun. In 1970, the same fate befell another camp at Dak Seang . What had once been a 30-kilometre-wide (20 mi) supply corridor now stretched for 140 km (90 mi) from east to west. In early-February 1971, 16,000 (later 20,000) ARVN troops crossed

9360-513: The trail. They also provided support for the Lao government. On 14 December 1964, the U.S. Air Force's (USAF) " Operation Barrel Roll " carried out the first systematic bombardment of the Hồ Chí Minh Trail in Laos. On 20 March 1965, after the initiation of Operation Rolling Thunder against North Vietnam, President Lyndon B. Johnson approved a corresponding escalation against the trail system. "Barrel Roll" continued in northeastern Laos while

9464-625: The transportation hub at Tchepone , on Laotian Route 9. Laotian elections in May brought a right-wing government to power in Laos, increasing dependence on U.S. military and economic aid and an increasingly antagonistic attitude toward North Vietnam. PAVN forces, alongside the Pathet Lao, invaded Laos on 28 July 1959, with fighting all along the border with North Vietnam against the Royal Lao Army (RLA). In September 1959, Hanoi established

9568-422: The voicing of the main-syllable stop in Proto-Viet–Muong that produced the fricative. For similar reasons, words beginning with /l/ and /ŋ/ occur in both registers. (Thompson 1976 reconstructed voiceless resonants to account for outcomes where resonants occur with a first-register tone, but this is no longer considered necessary, at least by Ferlus.) Old Vietnamese/Ancient Vietnamese was a Vietic language which

9672-452: The world such as in the United States , Germany and France . Vietnamese has a large number of vowels . Below is a vowel diagram of Vietnamese from Hanoi (including centering diphthongs ): Front and central vowels (i, ê, e, ư, â, ơ, ă, a) are unrounded , whereas the back vowels (u, ô, o) are rounded. The vowels â [ə] and ă [a] are pronounced very short, much shorter than the other vowels. Thus, ơ and â are basically pronounced

9776-555: The year that the 559th Group was using 20 bulldozers, 11 road graders, three rock crushers, and two steamrollers for maintenance and new road construction. As many as 43,000 North Vietnamese or Laotians were engaged in operating, improving, or extending the system. In 1969, 433,000 tonnes of ordnance fell on Laos. This was made possible by the end of "Operation Rolling Thunder" and the commencement of "Operation Commando Hunt" in November 1968. U.S. aircraft were freed for interdiction missions and as many as 500 per day were flying over Laos. By

9880-432: Was abandoned by early-1969. The sensor system was not sophisticated enough to detect enemy personnel, so the effort was given up until "Operation Island Tree" in late-1971. A revelation for U.S. intelligence analysts in late 1968 was the discovery of a petroleum pipeline running southwest from the northern port of Vinh . Initially, fuel was carried by porters, but this was inefficient and time-consuming, and thus highlighted

9984-443: Was accomplished. Human labour, pushing heavily laden bicycles, driving oxcarts, or acting as human pack animals, moving hundreds of tonnes of supplies in this fashion was quickly supplanted by truck transport—using Soviet, Chinese, or Eastern Bloc models—which quickly became the chief means of moving supplies and troops. As early as December 1961, the 3rd Truck Transportation Group of PAVN's General Rear Services Department had become

10088-494: Was borrowed) it was * r̝ , distinct at that time from * r . The following initial clusters occurred, with outcomes indicated: A large number of words were borrowed from Middle Chinese , forming part of the Sino-Vietnamese vocabulary . These caused the original introduction of the retroflex sounds /ʂ/ and /ʈ/ (modern s , tr ) into the language. Proto-Viet–Muong did not have tones. Tones developed later in some of

10192-523: Was constantly improved. By 1973, trucks could drive the entire length of the trail without emerging from the canopy except to ford streams or cross them on crude bridges built beneath the water's surface. The weather in southeastern Laos came to play a large role both in the supply effort and in U.S. and South Vietnamese efforts to interdict it. The southwest monsoon (commonly called the rainy season) from mid-May to mid-September, brought heavy precipitation (70% of 3,800 mm (150 in) per year). The sky

10296-484: Was historically written using chữ Nôm , a logographic script using Chinese characters ( chữ Hán ) to represent Sino-Vietnamese vocabulary and some native Vietnamese words, together with many locally invented characters representing other words. Early linguistic work in the late 19th and early 20th centuries ( Logan 1852, Forbes 1881, Müller 1888, Kuhn 1889, Schmidt 1905, Przyluski 1924, and Benedict 1942) classified Vietnamese as belonging to

10400-467: Was learned by U.S. intelligence that the enemy was using the Kong and Bang Fai Rivers to transport food, fuel, and munitions shipments by loading materiel into half-filled steel drums and then launching them into the rivers. They were later collected downstream by nets and booms. Unknown to the U.S., the North Vietnamese had also begun to transport and store more than 81,000 tonnes of supplies "to be utilized in

10504-466: Was made the equivalent of a Military Region in 1970 and the group was given the additional name, the "Truong Son Army". It was composed of four units, one division and three equivalent units: the 968th Infantry Division; 470th Group; 565th MAG; and 571st Rear Group. The units controlled fuel pipeline battalions. In July 1971, the Truong Son Army was reorganized into five divisional headquarters:

10608-533: Was mainly composed of 37 mm and 57 mm radar-controlled weapons. The next year, 85 mm and 100 mm guns appeared, and by the end of Commando Hunt , over 1,500 guns defended the system. Of all the weapons systems used against the trail, according to the official North Vietnamese history of the conflict, the AC-130 Spectre fixed-wing gunship was the most formidable adversary. The Spectres "established control over and successfully suppressed, to

10712-837: Was separated from Viet–Muong around the 9th century, and evolved into Middle Vietnamese by 16th century. The sources for the reconstruction of Old Vietnamese are Nom texts, such as the 12th-century/1486 Buddhist scripture Phật thuyết Đại báo phụ mẫu ân trọng kinh ("Sūtra explained by the Buddha on the Great Repayment of the Heavy Debt to Parents"), old inscriptions, and a late 13th-century (possibly 1293) Annan Jishi glossary by Chinese diplomat Chen Fu (c. 1259 – 1309). Old Vietnamese used Chinese characters phonetically where each word, monosyllabic in Modern Vietnamese,

10816-473: Was usually overcast with high temperatures. The northwest monsoon (the dry season), from mid-October to mid-March was relatively dry with lower temperatures. Since the road network in the trail system was generally dirt, the bulk of supply transport, and the military efforts that they supported, were conducted during the dry season. Eventually, the bulk of the trail was either asphalted or hard packed, thus allowing large quantities of supplies to be moved even during

#197802