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Anonymous
Japan was a German ally and Japan attacked the U.S. Navy at Pearl Harbor. Navies were a lot more important back then.
Wiki User
The u.s did join WW2
in 1956
The 8th of December 1941 was the date that the US joined world war 2
England
They joined in1941
zoosk
The Allies
joined in 1942
7 December 1941
The Bombing of Pearl Harbor
07 Dec 1941