Justified ReasonsCivilian Control of the Military – The U.S. Constitution gives ultimate authority over the military to civilian leadership. MacArthur publicly challenged Truman's policies, undermining this core democratic principle.Avoiding a Wider War – MacArthur pushed for expanding the war into China, including possible use of nuclear weapons. Truman wanted to avoid escalating the conflict into a third world war.Insurbordination – MacArthur made public statements and sent letters to Congress contradicting Truman’s strategy, which is a clear violation of military protocol.Unjustified ReasonsMacArthur's Popularity – MacArthur was a national hero and had public support. Some felt Truman’s firing ignored the will of the people and weakened morale.Military Expertise – Critics argued MacArthur had a better grasp of the war's realities on the ground and Truman, being far from the front lines, should have respected his judgment.Political Motivation – Some believed Truman acted to protect his political image, especially as the war in Korea became unpopular.[tex][/tex]