Japan ruled Korea from 1910 to 1945. After World War II, the Allies divided Korea along the 38th parallel, with the Soviet Union occupying the north and the United States occupying the south. In 1950, North Korea invaded South Korea, launching the Korean War. After early successes by North Korea, UN forces led by General MacArthur launched a surprise invasion at Inchon and drove North Korean forces north. However, China later entered the war on North Korea's side, pushing UN forces back south. An armistice in 1953 ended the fighting along the original border at the 38th parallel, dividing Korea into two opposing sides that remain to this day.