was now based on the idea that the war was an inter-imperialist conflict and hence there was no reason for the working class to side with Britain, France, or Poland against Germany, thus departing from the Comintern's anti-fascist popular front policy of 1934–1939. He labeled Poland as a fascist state oppressing Belarusians and Ukrainians. German diplomats had urged the Soviet Union to intervene against Poland from the east since the beginning of the war, but the Soviet Union was reluctant to intervene as Warsaw had not yet fallen. The Soviet decision to invade that part of eastern of Poland which had earlier been agreed as the Soviet zone of influence was communicated to the German ambassador Friedrich Werner von der Schulenburg on September 9, but the actual invasion was delayed for more than a week. The Polish intelligence became aware of the Soviet plans around September 12. Soviet invasion of eastern Poland On September 17 the Soviet Union finally entered the Polish territories that had been granted to it by the secret protocol of non-aggression pact from the east. As the pretexts to justify their actions, the Soviets cited the collapse of the Second Polish Republic and they claimed that they were trying to help the Belorussian and Ukrainian people. The Soviet invasion is usually considered direct result of the pact, although the revisionist school contends that this was not the case and that the Soviet decision was taken a few weeks later. The Soviet move was denounced by Britain and France, but they did not intervene. In an exchange of captured Polish territories in compliance with the terms of the protocol, already on September 17 the Red Army and Wehrmacht held a joint military parade in Brest; occupation of the city was then transferred by Germany to the Soviet troops. In the following battles with the rest of the Second Polish Republic's army, the Soviet Union occupied the territories roughly corresponding to its sphere of interests, as defined in the secret additional protocol to the Molotov–Ribbentrop Pact. The territory of Poland had been completely occupied by the two powers by October 6, and the Polish state was liquidated. In early November the Supreme Soviet of the Soviet Union annexed the occupied territories and the Soviet Union shared a common border with Nazi Germany, the Nazi-occupied Polish territories and Lithuania for the first time. After the invasion, cooperation between Germany