Final answer:
General George C. Marshall was appointed commander of the General European Theater of Operations and went to Europe in June 1942. Later, as Secretary of State, he developed the Marshall Plan, which was implemented from April 1948 to 1952 to help rebuild European economies.
Step-by-step explanation:
General George C. Marshall was a significant figure during and after World War II. His initial voyage to Europe as part of his military responsibilities occurred when he was appointed commander of the General European Theater of Operations in June 1942. It was at this time that the United States had entered World War II and Marshall was responsible for overseeing U.S. army operations in Europe. Following the war, as Secretary of State under President Truman, Marshall was instrumental in developing the European Recovery Program, commonly known as the Marshall Plan, which was implemented from April 1948 to 1952 to aid in the reconstruction of European economies devastated by the war.