Japan was trying to invade their territories and the Dutch East Indies. They could not let Japan take over Australia, Singapore, India, and other islands. Therefore they had to fight against both Japan and Germany.
bomb Japan or invade it
Japan has not tried to invade Russia. However, they did try to invade Mongolia which is bordered by Russia. The invasion was stopped by the Russian army.
Japan
China
1931
1548
Yes.
We didn't invade Japan because they predicted 500,000 American casualties. The perfection of the Atomic Bomb, made invasion unnecessary.
Persia invaded many territories. Which did you have in mind?
Japan invaded Abyssinia in 1931-1933
The Mongols tried to invade Japan.