S1, E5: US led UN forces retake Seoul, crush the North Korean forces around the Pusan Perimeter and cross the 38th Parallel into North Korea and push toward Pyongyang, the capital of North Korea, despite warnings from Communist China. U.S. Naval forces created what became the largest naval blockade in history and U.N. forces, including the 1st Marine Division, capture Pyongyang October 19, 1950.