Final answer:
Franklin D. Roosevelt's actions during World War II included providing aid, leading the United States in supporting the Allies, and shaping the postwar world.
Step-by-step explanation:
Franklin D. Roosevelt was known for several actions during World War II. Firstly, he provided aid to nations fighting totalitarianism while maintaining neutrality through policies such as Lend-Lease. Secondly, after the United States entered the war following the attack on Pearl Harbor, Roosevelt led the country in aiding the Allies in production and manpower. Lastly, he played a key role in shaping the postwar world, aiming for the United States to become the leader of Western capitalist democracies.