Summarize the importants events that led to the korean war

Korea was conquered by Japan during World War II. At the end of the war, Korea was partitioned at the Thirty-eighth Parallel into democratic South Korea and communist North Korea. The Korean War (1950-1953) was a United Nations effort to assist South Korea, which had been invaded by the army of North Korea. The administration of Harry S. Truman had pressured the UN Security Council for a resolution to use military force-UN troops and ships, led by the United States-to defend South Korea.