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
South Korea–United States relations of the most pro-American nations in the world. The new US Ambassador to South Korea arrived in Seoul on July 7, 2018. The post had been vacant since President Donald Trump took office in January 2017. Harry Harris, a former head of the US military's Pacific Command, has expressed his resolve to work as an ambassador to strengthen the alliance between the United States and South Korea. Leaders of South Korea and the United States from 1950 Cross-border skirmishes and raids at the 38th Parallel escalated into open warfare when the North Korean forces invaded South Korea on June 25,