By April 1975, North Vietnamese forces were in full advance and most ARVN resistance had collapsed. Đảo's 18th Division, however, made a significant defence at the Battle of Xuân Lộc, 38 miles from Saigon. The fierce fighting raged for two weeks. The 18th Division, facing People's Army of Vietnam (PAVN) forces, managed to hold on for three weeks, but was overwhelmed by 21 April 1975. Saigon fell nine days later.