There's some confusion here. Hitler never got anywhere near invading the U.S.
Hitler did not invade North Korea.
Hitler did invade the USSR on 22 June 1941.
No
About half of Europe.
Yes
Yes
No
They let him break promises and invade countries, so I guess they weren't to worried about him.
Eventually yes but but he wanted to conquer all of Europe he had Japan attack the US
Hitler first annexed Austria.
1939 Poland
Poland