;27 March to 2 May The Battle of Svay Rieng was the last major operation of the war to be mounted by the ARVN against the PAVN. The battle resulted in over 1,200 PAVN killed and 65 captured for ARVN losses of less than 100 killed.
April
;1-10 April Chí Linh Camp defended by the 215th Regional Force Company with a platoon of two 105 mm howitzers was attacked by the PAVN 7th Division, quickly damaging the two howitzers and destroying the ammunition dump. On 5 April the PAVN 3rd Battalion, 141st Regiment, with the division's 28th Sapper and 22d Artillery Battalion supporting, overran the base. By 10 April, about half of the defenders and 20 dependents had straggled into Đồng Xoài or Chơn Thành Camp to the west. The rest, about 50 men, remained unaccounted for. With the elimination of Chí Linh, the PAVN 7th Division enjoyed unimpeded movement along Highway 14 between Chơn Thành and Đồng Xoài.
May
;6 May Associated Press photographer Slava "Sal" Veder wins the Pulitzer Prize for Feature Photography for his photo Burst of Joy. ;16 May to 20 November The Battle of the Iron Triangle began on 16 May, when the PAVN 9th Division backed by a small contingent of tanks launched an attack on Rach Bap, took possession of An Dien and pushed south towards Phu Cuong. The ARVN counterattacked in mid-November and by 20 November had recaptured Rach Bap.
June
;3 June The PAVN hit Bien Hoa Air Base with at least 40 122 mm rockets doing minor damage to runways and destroying 500 Napalm canisters, but without damaging any aircraft. Other rockets exploded in hamlets surrounding the base, killing and wounding civilians.
;10 October Saigon Police attacked about 300 Vietnamese journalists and 1,000 supporters protesting against censorship under Press Law 007. ;31 October 75 civilians and policemen are injured in Saigon in anti-corruption protests led by Reverend Tran Huu Thanh, a Catholic priest.
December
From July 1965 to the end of 1974, some 6,500 officers and generals, as well as more than 4,500 soldiers and sergeants of the Soviet Armed Forces participated in the war. ;13 December to 6 January 1975 The Battle of Phuoc Long began in Phuoc Long Province, about from Saigon. The campaign against Phuoc Long reflected North Vietnam's change in policy after the strategic raids of 1974, taking full advantage of South Vietnam's critical military situation. ;13 December to 30 April 1975 The Ho Chi Minh Campaign, a series of increasingly large-scale and ambitious offensive operations by the PAVN and the Viet Cong, began on 13 December 1974. ;December to 6 January 1975 The 80-man 3rd Company, 314th Regional Force Battalion guarding the radio relay station on the summit of Nui Ba Den began receiving attacks of increasing intensity and frequency. PAVN assaults on Nui Ba Den continued throughout December 1974, but the RF Company held on. RVNAF efforts to resupply the troops on Nui Ba Den were largely unsuccessful. Helicopters were driven off by heavy fire, and fighter-bombers were forced to excessive altitudes by SA-7 missiles and antiaircraft artillery. One F-5A fighter-bomber was shot down by an SA-7 on 14 December. Finally on 6 January 1975, without food and water and with nearly all ammunition expended, the company picked up its wounded and withdrew down the mountain to friendly lines.
