In his speech to Congress, Roosevelt states:
Yesterday, December 7th, 1941, a date which will live in infamy, [the] United States of America was suddenly and deliberately attacked by naval and air forces of the empire of Japan. ... The facts of yesterday and today speak for themselves. The people of the United States have already formed their opinions, and well understand the implications for the very life and safety of our nation. With confidence in our armed forces, with the unbounding determination of our people, we will gain the inevitable triumph so help us God [applause]. I ask that the Congress declare that since the unprovoked and dastardly attack by Japan on Sunday, December 7th, 1941, a state of war has existed between the United States and the Japanese empire.