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Why didn't Stalin attack in 1940 while Gernans were busy fighting in France?
>>3289986
Because he wasn't ready yet.
Stalin thought that the alliance with Germany was benefiting both sides (which it was) and didn't want to squander it. He also knew the red army wasn't ready for war yet due to purges
>>3289986
Why didn't french attack while Germans were busy fighting Poland?
>>3289986
He didn't want to attack. He wanted to keep supplying them because he thought it would be a WWI style stalemate. He wasn't actually expecting Hitler to reach Paris so fast.
>>3290296
Because only about 60 divisions were committed to the attack on Poland, leaving considerable defenses along the Sigfried line and more mobilizing every day.