Why did Truman fire general MacArthur from his command in Korea?

President Harry S. Truman fired General Douglas MacArthur from his command in Korea in April 1951 primarily due to MacArthur's insubordination and public criticism of U.S. military policy. MacArthur advocated for a more aggressive approach, including expanding the war into China, which conflicted with Truman's strategy of limited engagement. Truman believed that MacArthur's actions undermined civilian control of the military and risked escalating the conflict. Ultimately, Truman prioritized a unified command structure and diplomatic resolution over military escalation.