USA HISTORY

Detailed explanation-1: -Following the Japanese attack on Pearl Harbor on December 7, 1941, an event he called “a date which will live in infamy", Roosevelt obtained a congressional declaration of war against Japan. On December 11 Japan’s allies, Nazi Germany and Fascist Italy declared war on the United States.

Detailed explanation-2: -Franklin D. Roosevelt-The White House.

Detailed explanation-3: -From the start of American involvement in World War II, Roosevelt took the lead in establishing a grand alliance among all countries fighting the Axis powers. He met with Churchill in a number of wartime conferences at which differences were settled amicably.