4th Corps () or Cửu Long Corps (, literally: Corps of Cửu Long or "Corps of the Mekong") was one of the four regular army corps of the People's Army of Vietnam. First organized in 1974 during the Vietnam War, 4th Corps had a major role in the Ho Chi Minh Campaign and the Cambodian–Vietnamese War. Before disbanding, the corps was stationed in Dĩ An, Bình Dương.
History In July 1973, the Central Committee of the Communist Party of Vietnam after its 21st conference issued a resolution of strengthening the armed forces in order to unify the country. In executing the issue, three months later the Ministry of Defence and the Military Commission of the Central Committee approved the plan of organizing regular army corps for the Vietnam People's Army. On July 20, 1974, General Võ Nguyên Giáp, Minister of Defence, signed the edict that led to the establishment of the 4th Corps in Đông Nam Bộ, where is located the part of Mekong River called Cửu Long River (Cửu Long Giang or Sông Cửu Long), from which came the name Cửu Long Corps of the unit. The first headquarters of the corps consisted of party committee secretary (bí thư) Hoàng Thế Thiện and commander (tư lệnh) Hoàng Cầm.
During the Ho Chi Minh Campaign, it was 4th Corps that advanced through the delta regions of Phước Long, Biên Hòa and later captured the Special Capital Military District of Saigon and several important targets within Saigon. After the Vietnam War, 4th Corps continued to engage in the Cambodian–Vietnamese War, the corps was awarded the title Hero of the People's Armed Forces (Anh hùng Lực lượng vũ trang nhân dân) in 1980.
On 13 September 2024, the plan to merge the 3rd and 4th Corps to form the 34th Corps was announced in the 3rd Corps Emulation Congress. The corps was disbanded on 7 December 2024 to form the 34th Corps.
Organization Headquarters Department of Staff 100th Guards Battalion 46th Reconnaissance Battalion 26th Signals Battalion 38th Chemical Defense Battalion Department of Politics Department of Logistics 6th Transportation Battalion Composite Warehouse Fuel Depot Department of Technicals K174 Technicals Warehouse
Combat forces 9th Division 1st Infantry Regiment 2nd Infantry Regiment 3rd Infantry Regiment 71st Air Defense Brigade 12th Air Defense Battalion (AZP S-60) 16th Air Defense Battalion (Type 65) 434th Artillery Brigade M101 howitzer battery M-46 field gun battery BM-21 MLRS battery
Right before disband, the Vietnam Ministry of Defense announced the decision to transfer 7th Division, 309th Division, 4th Military Hospital, 550th Engineer Brigade to 7th Military Region, 22nd Tank Brigade to the Armor-Tank Arms; River Crossing Battalion of 550th Engineer Brigade to the Engineer Arms.
Commanders Time Commander Notes1974–1981 Maj. Gen. Hoàng Cầm 1981–1982 Col. Nguyễn Văn Quảng 1982–1988 Maj. Gen. Võ Văn Dần 1988–1991 Maj. Gen. Vũ Văn Thước 1991–1995 Maj. Gen. Lê Văn Dũng Later promoted to General, Director of the General Department of Politics.1995–1999 Maj. Gen. Nguyễn Minh Chu 1999–2004 Maj. Gen. Nguyễn Năng Nguyễn Later promoted to Lieutenant General, Deputy Chief of the General Staff.2004–2010 Maj. Gen. Nguyễn Văn Thành 2010–2013 Maj. Gen. Nguyễn Hoàng 2013–2016 Maj. Gen. Võ Trọng Hệ 2016–2021 Maj. Gen. Phạm Xuân Thuyết 2016–Oct 2022 Maj. Gen. Lương Đình Lành Oct 2022–present Maj. Gen. Lê Văn Hướng
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