In July 1973, the Central Committee of the Communist Party of Vietnam after its 21st conference issued a resolution of strengthening the armed forces to unify the country. In executing the issue, three months later the Ministry of Defence and the Central Military Commission approved the plan of organising regular army corps for the Vietnam People's Army. On 24 October 1973,[6] General Võ Nguyên Giáp, Minister of Defence, signed the edict No. 142/QĐ-QP that led to the establishment of the 1st Corps in Tam Điệp, Ninh Bình.[7] The first headquarters of the corps was composed of party committee secretary (bí thư) Lê Quang Hòa and commander (tư lệnh) and deputy secretary Lê Trọng Tấn.
According to the decision of the Ministry of Defence, the organisational structure of the Corps includes: Corps Command. Three corps agencies: the General Staff, the Political Bureau, and the Logistics Department. Units upon establishment: 308th Infantry Division, 312th Division, 320B Infantry Division (later changed to 390th Division), 367th Air Defense Division, 202nd Tank-Armored Brigade, 45th Brigade Artillery, 299th Engineer Brigade and 140th Information Regiment.[6]
On 15 March 1975, while the Battle of Ban Me Thuot was gaining a crushing victory. 1st Corps was ordered to move into Southern Vietnam ready to fight. In just 12 days and nights, the entire formation of the corps (except for the 308th Division soldier who remained in Northern Vietnam on diversionary duty), had traveled over a distance of 1,789 km from the North to the South along the Ho Chi Minh trail, in time to enter the war zone directly participated in the fighting in the North of Saigon. After that, the corps moved into the battlefield along Highway 1 – Road 9 – through Lao Bao to Laotian territory – back to Kon Tum along route 14 through Buon Ma Thuot, on 14 April 1975 to Dong Xoai – Phuoc Long prepares for the final battle. During the Ho Chi Minh Campaign, Army Corps 1 received the task of attacking from the North of Saigon, encircling and destroying the enemy in Phú Lợi, Bến Cát, Bình Dương, Lai Khê, Tân Uyên; prevent the Army of the Republic of Vietnam's 5th Division from withdrawing to the inner city and neutralize this unit; attacked and captured the Chief of the Joint General Staff, the army command posts in Gò Vấp, Bình Thạnh; organized a combined attack force with other corps at the Independence Palace. Due to the urgent need to march from the North by all means of water, land and air. 1st Corps started the attack a day later than the other units.[8]
Organisation
The corps organisation before merged with the 2nd Corps to form the 12th Corps on 29 November 2023:[9]