Crusade in the Pacific examines the Korean War. After World War II, Korea is divided along the 38th Parallel. In the North, the Soviet Union influences a Communist government under Kim Il-sung. In the South, the United States shepherds a young Republic. The Korean peninsula is plunged into war when North Korea invades the South. The North quickly overwhelms the armed forces of the South until the United Nations intervenes. The conflict sours relations between the United States and Soviet Union. The United States enters the war and halts the North Koreans at Pusan.