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 Forces Korea UNC and CFC by coordinating and planning among US component commands and providing US supporting forces to the CFC. As such, USFK continues to support the ROK-US Mutual Defense Treaty. In response to the North Korean attack against South Korea on 25 June 1950, the United Nations Security Council (UNSC) established the UNC as a unified command under the US in UNSC Resolution 84 on 7 July 1950. The UNC mission was to assist South Korea to repel the attack and restore international peace and security in Korea. Throughout the war, 53 nations provided support to the UNC; 16 nations