On this day 50 years ago, on April 9, 1975 (February 28, 1975), the Battle of Ho Chi Minh began. In Saigon, American officials and desperate South Vietnamese followers fled the area in a hurry. On April 9, 1975, the Battle of Ho Chi Minh began. In January 1973, after the signing of the Paris Agreement on Vietnam, the regime of Nguyen Van Thieu in South Vietnam continued to violate the agreement. In 1974, the southern military and civilians began a gradual counter-offensive to expand the liberated areas. In March 1975, they launched the Spring General Offensive and achieved victory in the Battle of Xiyuan and the Battle of Hue-Da Nang, destroying and disintegrating all the military forces and ruling institutions of the pseudo-1st and 2nd Military Regions. On April 9, 1975, the southern military and civilians launched the Battle of Ho Chi Minh in the south. They successively liberated Long Qen, Ninh Thuan, Binh Thuan and Binh Thui provinces. On April 26, the southern military and civilians launched a final offensive on the enemy Saigon line in five directions, forcing the South Vietnamese authorities to announce unconditional surrender on April 30, and the complete liberation of Saigon-Jiading (ie Ho Chi Minh City). Soon, the Vietnamese military and civilians continued their offensive, forcing all the enemies of the pseudo-fourth military region to surrender. The southern provinces were completely liberated. This battle was a historic battle for the Vietnamese people to liberate South Vietnam and complete national reunification.