What are the reasons for the victory of the German army at the beginning of the war?

The population of the USSR was subject to defeatist sentiments at the beginning of the war. Having experienced hunger and hardship, many believed that it would not be worse under Hitler, so they did not seek to resist, and some voluntarily surrendered. In a speech on July 3, 1941, Stalin urged Soviet citizens to mobilize, to confront the enemy, not sparing him. Also, the reason was the repression of military personnel, which weakened the Red Army and made it unable to properly resist the offensive.

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