On September 1st 1939 Germany invaded Poland. 200,000 poles were held hostage,killed , or injured. I think this event is important because it shows how much of a jerk that germany could be.
On December 4th 1941 Japan did a bomb attack on pearl harbor. The japanese managed to whipe out 350 american ships. I think this event is important because it shows that japan is not affraid of anything.
In June during the 1940s Germany attempted to invade Russia but the weather conditions held them back due to the wet and muddy grounds they couldn't fully invade. I think this is important because germany's plan had backfired.