

In fact, the Soviets agreed not to aid France or the UK in the event of their going to war with Germany over Poland and, in a secret protocol of the pact, the Germans and the Soviets agreed to divide Eastern Europe, including Poland, into two spheres of influence the western ⅓ of the country was to go to Germany and the eastern ⅔ to the Soviet Union. With the surprise signing of the Molotov–Ribbentrop Pact on 23 August, the result of secret Nazi-Soviet talks held in Moscow, Germany neutralized the possibility of Soviet opposition to a campaign against Poland and war became imminent. Hitler had already issued orders to prepare for a possible "solution of the Polish problem by military means" through the Case White scenario. During this interim period, the Germans learned that France and Britain had failed to secure an alliance with the Soviet Union against Germany, and that the Soviet Union was interested in an alliance with Germany against Poland. Talks over Danzig and the Corridor broke down and months passed without diplomatic interaction between Germany and Poland.

On 28 April 1939, Hitler unilaterally withdrew from both the German-Polish Non-Aggression Pact of 1934 and the London Naval Agreement of 1935.

With tensions mounting, Germany turned to aggressive diplomacy.
