Who led troops in North Korea?

General Douglas MacArthur led United Nations forces during the Korean War, including troops in North Korea. He was the commander of the U.S. Far East Command and played a pivotal role in the early stages of the war, particularly during the Inchon Landing in September 1950. His leadership was significant in pushing North Korean forces back and advancing into North Korea. However, he was later relieved of command by President Harry S. Truman in April 1951 due to disagreements over military strategy.