Why was it difficult for Hitler to conquer the Soviet Union?

One of the most important reasons for this was poor strategic planning. The Germans had no satisfactory long-term plan for the invasion. They mistakenly assumed that the campaign would be a short one, and that the Soviets would give in after suffering the shock of massive initial defeats.

Explanation:

chamberlains goal was to stop the uk ad germany from fighting which he went to hitler and asked if he could sign a peace treaty between germany and the uk

nothing did. japan is wierd and always was.