The war began in June 1950 when communist forces crossed the 38th parallel to enter South Korea. Anti-communist forces retreated to a perimeter around the southern city of Busan. The U.S. staged a landing behind communist lines at Inchon, near Seoul, on September 15, 1950. This tactic routed the North Koreans. In a controversial move, Truman ordered US forces to pursue the North Koreans across the 38th parallel. | The war began in June 1950 when communist forces crossed the 38th parallel to enter South Korea. Anti-communist forces retreated to a perimeter around the southern city of Busan. The U.S. staged a landing behind communist lines at Inchon, near Seoul, on September 15, 1950. This tactic routed the North Koreans. In a controversial move, Truman ordered US forces to pursue the North Koreans across the 38th parallel. |