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| Armed Forces of the Republic of Vietnam | |
|---|---|
| Name | Armed Forces of the Republic of Vietnam |
| Native name | Quân lực Việt Nam Cộng hòa |
| Founded | 1955 |
| Disbanded | 1975 |
| Head of state | Ngô Đình Diệm, Nguyễn Văn Thiệu |
| Commander in chief | President of South Vietnam |
| Branches | Army of the Republic of Vietnam, Republic of Vietnam Navy, Republic of Vietnam Air Force |
| Garrison | Saigon |
| Battles | First Indochina War, Vietnam War, Tet Offensive, Fall of Saigon |
| Identification symbol | Flag of South Vietnam |
Armed Forces of the Republic of Vietnam were the military forces of the Republic of Vietnam from 1955 to 1975. They evolved from units raised during the First Indochina War and were central to the Vietnam War counterinsurgency and conventional campaigns. The forces comprised army, navy, air force components and paramilitary elements that interacted with allied United States Armed Forces, Australian Army, New Zealand Army, and other coalition partners.
Formed after the 1954 Geneva Accords and the dissolution of the French Far East Expeditionary Corps, the forces grew under the leadership of Ngô Đình Diệm and subsequent presidents including Nguyễn Văn Thiệu and Trần Văn Hương. Early expansion occurred during the 1955 Battle for Saigon political consolidation and the 1959-1963 escalation of the Viet Cong insurgency. Major transformations followed the 1963 coup against Ngô Đình Diệm, the 1964 Gulf of Tonkin incident, and the large-scale U.S. deployments after Operation Rolling Thunder. The 1968 Tet Offensive prompted doctrinal shifts; the 1973 Paris Peace Accords led to U.S. withdrawal and increased responsibility during the 1975 Spring Offensive culminating in the Fall of Saigon.
Organized into the Army of the Republic of Vietnam (ARVN), Republic of Vietnam Navy (RVNN), and Republic of Vietnam Air Force (RVNAF), the forces also encompassed the Regional Forces and Popular Forces militia, the Rangers, and the Airborne formations. Command structures linked provincial Military Regional Commands and corps-level headquarters such as I Corps (South Vietnam), II Corps (South Vietnam), III Corps (South Vietnam), and IV Corps (South Vietnam). Specialized units included Long Range Reconnaissance Patrols, Engineer Battalions (South Vietnam), and Military Police (South Vietnam). Logistics depended heavily on U.S. institutions like Military Assistance Command, Vietnam (MACV) and programs such as Civil Operations and Revolutionary Development Support.
Personnel policies combined volunteer service, conscription under laws enacted by the National Assembly (South Vietnam), and recruitment drives coordinated with provincial authorities. Conscription terms, age brackets, and exemptions were administered amid political disputes involving leaders such as Nguyễn Cao Kỳ and Nguyễn Văn Thiệu. The officer corps featured graduates of the Da Lat Military Academy and the National Military Academy of Vietnam, with foreign training at Fort Leavenworth, Naval War College, and Goodfellow Air Force Base. Integration of ethnic minorities from regions like the Central Highlands and the Mekong Delta raised challenges involving groups such as the Montagnards and Khmer Krom.
Equipped initially with matériel from the French Fourth Republic and subsequently with large quantities of U.S. systems under programs like Military Assistance Program (MAP), inventory included small arms such as the M1 Garand, M16 rifle, AK-47 captured from People's Army of Vietnam forces, crew-served weapons like the M60 machine gun, artillery pieces including the M101 howitzer, armored vehicles such as the M48 Patton, and helicopters like the Bell UH-1 Iroquois provided via Military Assistance Command, Vietnam – Studies and Observations Group support channels. Naval assets ranged from riverine patrol boats including the PCF (Swift Boat) equivalents to larger ships transferred through the U.S. Naval Assistance Program. Air assets comprised fighters and transports such as the McDonnell Douglas F-4 Phantom II, C-130 Hercules, A-1 Skyraider, and trainer types from Lockheed and Northrop.
ARVN and allied operations included counterinsurgency campaigns like Operation Hump, coordinated combined-arms operations with U.S. Army units during Operation Junction City, defensive actions during the Easter Offensive (1972), and the final defensive efforts in the Ho Chi Minh Campaign. Major battles and engagements involved the Battle of Khe Sanh, Battle of Hue (1968), Battle of Dak To, Battle of Xuan Loc, and protracted actions along the Ho Chi Minh Trail. Cross-border operations connected to Operation Lam Son 719 and interactions with Laotian Civil War dynamics. The navy participated in Operation Market Time and riverine warfare in the Mekong Delta; the air force executed interdiction missions, close air support, and air defense coordination with assets from the Seventh Air Force.
Doctrine evolved from French counterinsurgency influences to U.S. counterinsurgency and conventional combined-arms doctrines articulated in MACV advisories and ARVN manuals. Training institutions included the Military Academy (Da Lat), airborne and ranger schools, and provincial training centers supported by U.S. advisors from organizations like Military Assistance Command, Vietnam (MACV) and the U.S. Army Training and Doctrine Command equivalents. Emphasis shifted between civic action programs linked to Civil Operations and Revolutionary Development Support (CORDS), village defense concepts drawn from Strategic Hamlet Program lessons, and conventional maneuver warfare taught in corps headquarters with translations of U.S. field manuals.
The forces were deeply entangled in politics, with officers such as Dương Văn Minh, Ngô Đình Diệm, Trần Văn Đôn, and Nguyễn Khánh participating directly in coups and governance. Military figures held ministerial positions and shaped policies during periods like the 1963 South Vietnamese coup, the 1967 South Vietnamese presidential election, and the post-1973 political realignments. Relations with civilian institutions such as the National Assembly (South Vietnam) and provincial councils were mediated by security concerns around the Viet Cong insurgency and political crises like the Buddhist crisis (1963). Internationally, civil-military relations reflected dependence on United States Department of Defense assistance and coordination with allies including Australia, New Zealand, South Korea, and Thailand.