The Army of the Republic of Vietnam composed the ground forces of the South Vietnamese military from its inception in 1955 to the Fall of Saigon in April 1975. At the ARVN's peak, an estimated 1 in 9 citizens of South Vietnam were enlisted,composed of Regular Forces and the more voluntary Regional Forces and the Popular Force militias. It is estimated to have suffered 1,394,000 casualties during the Vietnam War.
The Khmer Republic was a Cambodian state under the United States-backed military dictatorship of Marshal Lon Nol from 1970 to 1975. Its establishment was formally declared on 9 October 1970, following the 18 March 1970 coup d'état which saw the overthrow of Norodom Sihanouk's government and the abolishment of the Cambodian monarchy.
The Cambodian Civil War was a civil war in Cambodia fought between the forces of the Communist Party of Kampuchea against the government forces of the Kingdom of Cambodia and, after October 1970, the Khmer Republic, which had succeeded the kingdom.
The battle of Dak To in Vietnam was a series of major engagements of the Vietnam War that took place between 3 and 23 November 1967, in Kon Tum Province, in the Central Highlands of the Republic of Vietnam. The action at Đắk Tô was one of a series of People's Army of Vietnam (PAVN) offensive initiatives that began during the second half of the year. PAVN attacks at Lộc Ninh, Sông Bé and at Con Thien and Khe Sanh,, were other actions which, combined with Đắk Tô, became known as "the border battles". The post hoc purported objective of the PAVN forces was to distract American and South Vietnamese forces away from cities towards the borders in preparation for the Tet Offensive.
The Easter Offensive, also known as the 1972 spring–summer offensive by North Vietnam, or the Red Fiery Summer as romanticized in South Vietnamese literature, was a military campaign conducted by the People's Army of Vietnam against the Army of the Republic of Vietnam and the United States military between 30 March and 22 October 1972, during the Vietnam War.
The Khmer National Armed Forces were the official armed defense forces of the Khmer Republic, a short-lived state that existed from 1970 to 1975, known today as Cambodia. The FANK was the successor of the Royal Khmer Armed Forces (FARK) which had been responsible for the defense of the previous Kingdom of Cambodia since its independence in 1953 from France.
The Cambodian campaign was a series of military operations conducted in eastern Cambodia in mid-1970 by South Vietnam and the United States as an expansion of the Vietnam War and the Cambodian Civil War. Thirteen operations were conducted by the Army of the Republic of Vietnam (ARVN) between April 29 and July 22 and by U.S. forces between May 1 and June 30, 1970.
The Battle of An Lão was a battle that took place in the An Lão District of Bình Định Province, just over 300 miles north-east of Saigon between December 7–9, 1964. The battle was part of a larger 5th Military Region operation known as Campaign An Lão to capture An Lão valley, and use it as a corridor between their military bases in Quảng Ngãi Province and Bình Định Province.
Operation Chenla II or Chenla Two was a major military operation conducted by the Khmer National Armed Forces (FANK) during the Cambodian Civil War from 20 August until 3 December 1971.
Operation Chenla I or Chenla One was a major military operation conducted by the Khmer National Armed Forces (FANK) during the Cambodian Civil War. It began in late August 1970 and ended in February 1971, due to the FANK High Command's decision to withdraw some units from Tang Kauk to protect Phnom Penh after Pochentong airbase was attacked.
The United States continued its unilateral withdrawal of forces from South Vietnam notwithstanding the lack of progress at the Paris Peace Talks. The removal of Prince Norodom Sihanouk from power in Cambodia in March and his replacement by General Lon Nol, began the Cambodian Civil War. South Vietnamese and U.S. forces entered Cambodia in late April to attack People's Army of Vietnam (PAVN) and Vietcong (VC) bases and supply lines there which had long been used to support the insurgency in South Vietnam. The expansion of the war revitalized the antiwar movement in the U.S. and led to the Kent State shootings and Jackson State killings in May. While U.S. ground forces withdrew from Cambodia at the end of June and legislation was passed to prevent their reintroduction, the South Vietnamese conducted operations in Cambodia for the rest of the year and the U.S. provided air support and military aid to the Cambodian government. Despite this support the Cambodians lost control of vast areas of the country to the PAVN. Within South Vietnam the second half of the year saw a reduction in large U.S. operations with the focus shifting to pacification and population security and supporting Vietnamization. The PAVN/VC generally reverted to sapper attacks and attacks by fire but they fought hard to defend their base areas and infiltration routes.
1972 in the Vietnam War saw foreign involvement in South Vietnam slowly declining. Three allies, Australia, New Zealand and Thailand, which had each contributed military contingents, left South Vietnam this year. The United States continued to participate in combat, primarily with air power to assist the South Vietnamese, while negotiators in Paris tried to hammer out a peace agreement and withdrawal strategy for the United States.
1973 in the Vietnam War began with a peace agreement, the Paris Peace Accords, signed by the United States and South Vietnam on one side of the Vietnam War and communist North Vietnam and the insurgent Viet Cong on the other. Although honored in some respects, the peace agreement was violated by both North and South Vietnam as the struggle for power and control of territory in South Vietnam continued. North Vietnam released all American prisoners of war and the United States completed its military withdrawal from South Vietnam.
The Khmer National Army was the land component of the Khmer National Armed Forces (FANK), the official military of the Khmer Republic during the Cambodian Civil War between 1970 and 1975.
The fall of Phnom Penh was the capture of Phnom Penh, capital of the Khmer Republic, by the Khmer Rouge on 17 April 1975, effectively ending the Cambodian Civil War. At the beginning of April 1975, Phnom Penh, one of the last remaining strongholds of the Khmer Republic, was surrounded by the Khmer Rouge and totally dependent on aerial resupply through Pochentong Airport.
The Battle of Hồng Ngự took place from March to 4 May 1973 when North Vietnamese forces attacked the border town of Hồng Ngự in Dong Thap Province in order to interdict supply convoys into Cambodia. The attack was defeated by South Vietnamese forces assisted by United States bombing of North Vietnamese base areas in Cambodia.
Operation Cuu Long 44-02 was an operation during the Vietnam War conducted by South Vietnamese and Cambodian forces from 13-25 January 1971 to reopen Route 4 in Cambodia.
Operation Chicago Peak was a joint U.S. Army and Army of the Republic of Vietnam (ARVN) military operation during the Vietnam War designed to keep pressure on the People's Army of Vietnam (PAVN) units in the A Sầu Valley and prevent them from mounting any attacks on the neighboring coastal provinces.
The Easter Offensive in southern Cambodia and the Mekong Delta was part of the People’s Army of Vietnam (PAVN)’s Easter Offensive of 1972 and saw PAVN and Viet Cong (VC) engage the Army of the Republic of Vietnam (ARVN) and Khmer National Armed Forces (FANK) supported by the United States along the southern Cambodian border with South Vietnam and in the Mekong Delta of South Vietnam. The offensive failed to seriously disrupt the vital South Vietnamese supply routes in the Delta or the pacification efforts there.
North Vietnam 
South Vietnam 
Khmer Republic 
