The Invasion of Poland Wasn't Hitler's First Aggression. Here's Why That Move Marked the Beginning of WWII
Roughly 1.5 million German soldiers, 2,000 airplanes and 2,500 tanks crossed the Polish border on Sept. 1, 1939
Roughly 1.5 million German soldiers, 2,000 airplanes and 2,500 tanks crossed the Polish border on Sept. 1, 1939