The immediate cause was Japan's attack on Pearl Harbor. This caused the US to declare war on Japan, which led to Germany and Italy declaring war on the US.
world war 2
FDR.
Tojo
Tojo
The two military options that led to the end of World War 2 were the victory in Berlin and the use of atomic bombs in Japan.
Joan of Arc!
Nimitz .
Stalin .
Catdog
Ion Antonescu
Winston Churchill