• Germany decides to take over the world. (See also: The Schlieffen Plan)
• Japan gets into the act.
• The Allies fight back.
• The US doesn't help.
• Pearl Harbor is bombed by Japan. The US gets annoyed and joins the fight.
• The Allies invade Normandy, France.
• The USA nukes Japan.

Maybe in the next world war we can count on France and Greece to bail us out?