The Battle of Xuân Lộc was the last major battle of the Vietnam War that took place at Xuân Lộc, Đồng Nai Province. Over a period of twelve days between 9 and 21 April 1975, the outnumbered South Vietnamese reserves attempted to stop the North Vietnamese forces from overrunning the town and breaking through towards South Vietnam's capital, Saigon. The Army of the Republic of Vietnam (ARVN) committed almost all their remaining mobile forces, especially the 18th Division, under Brigadier General Lê Minh Đảo, to the defence of the strategic crossroads town of Xuân Lộc, hoping to stall the People's Army of Vietnam (PAVN) advance. The battle ended when the town of Xuân Lộc was captured by the PAVN 4th Army Corps led by Major General Hoàng Cầm.

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.