Korean war By alanh125 Jun 24, 1950 North Korea invades South Korea Jun 27, 1950 Truman orders air and naval support for South Korea Sep 15, 1950 U.S. troops invade at Inchon Oct 19, 1950 Pyongyang falls to UN forces Nov 4, 1950 China enters the war Nov 27, 1950 Battle of Chosin Reservoir U.S and UN forces managed to hold of the Chinese forces but were now in the defensive. Mar 25, 1951 Eighth Army retakes Seoul U.S and UN forces retake Seoul again, the U.S is now on the offensive Aug 4, 1952 armistice negotiations 1953 Armistice signed