1On June 25th, 950, the Korean civil war broke out. In order to maintain its position in Asia, the United States immediately sent troops to intervene. On 26th, U.S. President H.S. Truman ordered the U.S. navy and air force in the Far East to participate in the war and support the Korean national army. On the 27th, H.S. Truman issued a statement, announcing the dispatch of troops and making the 7th Fleet of the US Navy invade the Taiwan Province Strait in China. On the same day, the United Nations Security Council, without the participation of the Soviet Union, adopted the United States proposal, demanding that all Member States give "necessary assistance" to South Korea militarily. On July 7, the United Nations Security Council adopted the proposal of the United States to establish a joint command to command the troops of various countries on the Korean peninsula. On the 8th, Truman appointed D. MacArthur, commander-in-chief of the American Far East Army, as commander-in-chief of the "United Nations Army" (later succeeded by M.B. Li Qiwei and M.W. Clark).