MacArthur is a major figure(重要人物)in the US military and diplomatic history of WWII and post-WWII.
He was promoted to the rank of five-star general(陸軍元帥)in 1944 and was viewed as a hero by many, but he was suddenly relieved(解任される)of duty(任務)by President Truman at the height of the Korean War. Why was he dismissed?