LOL, Hitler threatened the USSR in Mein Kampf. He was open about his intentions. The USSR knew they were the target at least 10 years before the war, and they spent years trying to get the European powers to support a resistance movement. But the USSR quickly learned that actually all of the European leaders were on the side of the Nazis and would be happy to see the USSR invaded, so the Soviets needed to find a way to resist them without losing, and that meant strategic retreat and losses until the enemy was overextended and at its most vulnerable. The fact that the Soviets won against the most powerful military in the world is a testament to the fact that their strategy worked.
LOL, Hitler threatened the USSR in Mein Kampf. He was open about his intentions. The USSR knew they were the target at least 10 years before the war, and they spent years trying to get the European powers to support a resistance movement. But the USSR quickly learned that actually all of the European leaders were on the side of the Nazis and would be happy to see the USSR invaded, so the Soviets needed to find a way to resist them without losing, and that meant strategic retreat and losses until the enemy was overextended and at its most vulnerable. The fact that the Soviets won against the most powerful military in the world is a testament to the fact that their strategy worked.