Answer :

Final answer:

Adolf Hitler broke the German-Soviet Nonaggression Pact by launching an attack against the Soviet Union known as Operation Barbarossa in June 1941. The attack was largely successful, leading the Soviet Union to formally join the Allies in opposition to Germany. The rapid German advance resulted in large Soviet losses, creating a dire situation for the USSR.

Explanation:

Hitler broke his pact with Stalin, launching an attack against the Soviet Union known as Operation Barbarossa on June 22, 1941. This marked a significant betrayal of the German-Soviet Nonaggression Pact. Hitler was confident he could defeat Stalin due to perceived weaknesses in the Soviet Union's earlier engagements, such as the invasion of Poland and the Winter War against Finland.

The German-Soviet Nonaggression Pact had been signed in August 1939, with both nations agreeing to divide Poland between them and refrain from attacking each other. However, Hitler saw the Soviet Union as a significant threat, and with the successful assembly of the largest land-invasion force in world history, he began his offensive against Stalin.

The breaching of the pact led the Soviet Union to formally join the Allies in opposing Germany. The rapid progress made by German troops led to a desperate situation for the Soviet Union, which had lost a significant proportion of its military force within several months.

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