The Non-aggression Pact
Adolf Hitler signed the non-aggression pact on August 28, 1939 with the Soviet Union.To progress with the invasion of Poland, Hitler could not wage war on two fronts. Hitler knew that Britain and France would come to the aid of Poland and seek a non-aggression pact with the Soviet Union. This was a crucial strategic decision that Hitler initiated to gain the temporary allegiance of Soviet leaders. The Soviet Union's military was very powerful and and posed a credible threat to Germany's plans for military action. The Soviet Union subsequently invaded Poland from the east leading to the occupation of Poland by both armies.
“Any alliance whose purpose is not the intention to wage war is senseless and useless.” –Adolf Hitler