Harry S. Truman, Winston Churchill, and Chiang Kai-shek issued the Potsdam Declaration to Japan: “We call upon the Government of Japan to proclaim now the unconditional surrender of all the Japanese armed forces, and to provide proper and adequate assurances of their good faith in such action. The alternative for Japan is prompt and utter destruction.”
The Alien Registration Act required all adult non-citizens to register with the US government and imposed penalties for anyone who “advocates . . . overthrowing or destroying the government of the United States.”
Congress passed the Lend-Lease Act, which allowed any country “whose defense the President deems vital to the defense of the United States” to receive arms and equipment from the United States by sale, transfer, or lease.
Roosevelt and Churchill met in Casablanca, Morocco, and approved the policy of unconditional surrender. The trip made Roosevelt the first sitting president to both travel to Africa and leave the country during war.