Japan attacks USA at Pearl Harbour.

Sunday, 7 December, 1941

A state of war results from the surprise attack on the US Pacific Fleet anchored at Pearl Harbour, Honolulu, by the Empire of Japan. The Japanese declared war on that day, although not received by the US until the next day, 8 December, when Congress passed a declaration of war on Japan. President Franklin D. Roosevelt proclaimed the day ‘a date which will live in infamy’ as the US was a neutral state and attacked before the declaration of war was made.