If I'm not mistaken...
Japan and Germany didn't officially become allies until after Pearl Harbor because it was the attack on Pearl harbor that prompted Hitler to declare war on the US.
The only assassination attempt on Hitler up to that point was in Munich 1939 and it was not by his own guards.
The Brits did not attack Germany from the east, that was the Red Army (Russians).
I didn't have time to check all the facts, but you get the idea. As far as the flash itself, it wasn't bad. I might have made something like this myself if they had flash back when I was in school.