Formation of the anti-Hitler coalition.

The coalition began to form in 1939. All countries that were against Hitler and his allies united. The first were Poland, Great Britain and France (the latter reacted to the aggression towards Poland). Over time, more and more countries were subjected to the aggression of the Axis countries (Rome-Berlin-Tokyo). The USSR joined the coalition after June 1941, the United States became actively involved after the attack on Pearl Harbor. Conferences were held between the USSR, Great Britain and the USA, where a plan of common actions was worked out.