What is the significance of the "Nazi-Soviet Non-Aggression Pact"?

Answer: The purpose of the pact was to open the way for both nations to invade Poland. Hitler wanted a nonaggression pact with the Soviet Union so that his armies could invade Poland virtually unopposed by a major power, after which Germany could deal with the forces of France and Britain in the west without having to simultaneously fight the Soviet Union on a second front in the east.