Complex sentence: In 1945, the Soviet Union and the United States agreed on the surrender of Japanese forces in Korea in the aftermath of World War II, leaving Korea partitioned along the 38th parallel, with the north under Soviet occupation and the south under U.S. occupation.
Split into simpler sentences: In 1945, the Soviet Union and the United States agreed on the surrender of Japanese forces in Korea. The aftermath of World War II and surrender of Japanese forces in the Korean peninsula left Korea partitioned along the 38th parallel, with the north under Soviet occupation and the south under U.S. occupation.