Hitler knew that to invade the USSR, he had to first make sure to break the German-Soviet nonaggression pact.
This was an agreement that Germany and the Soviet Union signed just before the second World War broke out that they would not attack each other.
In order to invade the USSR therefore, Hitler knew that he would have to break this Pact but didn't care much about it.
Find out more on the German-Soviet nonaggression pact at https://brainly.com/question/1107948.
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