How did allies of America feel after Americans get involved in world war 2?

France, England, Russia, China, US - these were the primary large forces - there were others like Australia for example, who joined the allied fight.

After the Japanese bombed Pearl Harbor, the U.S. entered the war.

The US Fleet was attacked at Pearl Harbor on 7 December 1941.

Americans got invoved because we really don't want Hitler running the world and if you remember we where attacked by the Japanese so we really didnt have a choice

We were officialy involved in 1941 when we retaliated the Pearl Harbor attack with an a-bomb on Japan. Less than a week after the attack Germany and Italy declared war on the U.S.