Timeline of United States military operations May 1949. 1948–1949: China: Marines were dispatched to Nanking to protect the American Embassy when the city fell to Communist troops, and to Shanghai to aid in the protection and evacuation of Americans. 1950–1953: Korean War: The United States responded to the North Korean invasion of South Korea by going to its assistance, pursuant to United Nations Security Council resolutions. US forces deployed in Korea exceeded 300,000 during the last year of the active conflict (1953). Over 36,600 US military were killed in action. 1950–1955: Formosa (Taiwan): In June 1950, at the beginning of the Korean War, President Truman ordered
United States Air Force In South Korea United States Air Force In South Korea The United States Air Force in South Korea is composed of units assigned to Pacific Air Forces Seventh Air Force. The mission of the personnel, equipment and aircraft is to deter, protect and defend the Republic of Korea from attack from the Democratic People's Republic of Korea (DPRK) or more commonly known as North Korea. The mission of Seventh Air Force is to plan, direct, and conduct combined air operations in the Republic of Korea and in the Northwest Pacific in support of PACAF, the United States Pacific Command, United Nations Command, US-ROK