Why was Europe unable to prevent World War Two?
The main allies in Europe before the start of the Second World
War were certain that after the concessions they made to Hitler, he
would not force their hands into a war. Up until September of 1939,
Hitler had always made demands on European territories, but managed
to use his own brand of diplomacy to achieve his means without war.
France and England were sure that Hitler would not take the chance
of starting a major war. Another factor was the German Soviet
Nonaggression Pact of 1939. The secret provisions in the pact gave
Hitler the go ahead to invade Poland and France without
interference from the Soviet Union.