who was the person served in World War 2 and later secretary of state and defense?

The person who served in World War II and later became both Secretary of State and Secretary of Defense was George C. Marshall. He played a critical role in coordinating the U.S. military efforts during the war and is well-known for the Marshall Plan, which aided in the reconstruction of Europe post-war. Marshall served as Secretary of State from 1947 to 1949 and as Secretary of Defense from 1950 to 1951. His contributions to military strategy and foreign policy have had a lasting impact on U.S. history.