500导航

　　In this thought provoking history documentary, leading historians consider strategies that could have been used to avoid conflict with Hitler and prevent World War II. 　　Before the war began, nations adopted a policy of appeasement to the Nazi regime. But the threat of Hitler and the lengths he would go to achieve his barbaric aims were constantly underestimated. 　　S1 E1 - The Poli... (展开全部)