Walton Walker backed South Korea, and China allied with the Soviet Union in what was to become the first military action of the Cold War. Shortly after 75,000 North Korean troops with tanks invaded South Korea on June 25, 1950, American air and sea forces were ordered by President Harry S. Truman to give South Korean troops support. The U.S. Eighth Army was ordered to intervene and drive the invaders back across the 38th parallel, the border between the two countries. With only four lightly equipped and poorly trained divisions, Walker began landing troops on the southeast side of the Korean peninsula
25th Infantry Division Artillery (United States) Division was ordered to defend the final US/South Korean stronghold of Pusan against North Korean attack. In July 1950, the 25th DIVARTY landed in South Korea with the 8th, 64th, 90th, and the 159th Field Artillery Battalions. 25th DIVARTY fires supported the first offensive actions by the division with the capture of the Yechon Road Junction on July 20, 1950. 25th DIVARTY participated in all ten of 25th Infantry Division's campaigns. 25th DIVARTY entered the Vietnam War in support of 25th Infantry Division, 1st Marine Division, and Republic of Vietnam forces to provide fire support to these units, additionally 25th