At the end of March (referring to 1939), that is, six months before the conclusion of the treaty signed by Molotov and Ribbentrop, the fascists began to prepare for an invasion of Poland. There was no hint yet that Moscow might be disappointed in sabotaging the UK and France with an agreement on joint actions in the event of Hitler's aggression and would decide to conclude a pact with Nazi Germany.
Was it the sole responsibility of the USSR to prevent the Nazi invasion of Poland? What was Great Britain doing at that time? What was France doing? And most importantly, where was the United States?
My suspicions were justified. History still need to know, so as not to ask such questions. Dear Madam, when Russia and Germany were fraternizing and conducting joint military military parades in Brest, Britain and France were at war with Germany. As a result of a joint attack by Germany and the USSR on Poland, the state of Poland ceased to exist. September 17, 1939 after the Soviet attack on Poland, the Polish government was forced to leave the country to continue the struggle in exile. While in Moscow admired friendship with Hitler in the Atlantic was a war. From September to December 1939, Britain as a result of the action of German submarines and battleships lost more than 100 merchant ships, which significantly undermined its economy. The Soviet Union during this time attacked Finland, for which he was expelled from the League of Nations. In short, better read historical sources.