The document discusses several key events and concepts related to the causes of World War II:
1) It discusses Hitler's rise to power in Germany and his implementation of totalitarian rule. It also explains concepts like fascism, Nazism, and totalitarianism.
2) It covers German aggression in the 1930s like remilitarization, occupation of the Rhineland, and annexation of Austria. It also discusses appeasement and the Munich Agreement.
3) It summarizes Japanese expansionism and militarism in the 1930s. It explains Japan's growing tensions with the U.S. over trade which ultimately led to the attack on Pearl Harbor.
4) It briefly outlines U.