The main focus of the U.S. Marshall Plan after World War II was to provide economic aid for the recovery of war-torn European nations. Enacted in 1948, the plan aimed to prevent the spread of communism by stabilizing these countries through financial assistance, thus promoting political stability and economic prosperity. The Marshall Plan provided over $12 billion, allowing nations like France and West Germany to rebuild their economies. This initiative not only helped in reconstruction but also strengthened alliances between the U.S. and Western European nations.