This document provides an overview of 20th century dictators and World War II. It describes the rise of totalitarian fascist and communist regimes in Europe and Asia led by dictators like Mussolini, Hitler, Stalin, and Mao who sought total control over all aspects of society. It then outlines key events in World War II such as Germany's rapid military conquests using blitzkrieg tactics, the Holocaust, and Japan's attack on Pearl Harbor which drew the US into the war. The summary concludes with the Allied victories against Germany and Japan by 1943-1945 and discussions between Allied leaders Churchill, Roosevelt, and Stalin over the postwar order as the Cold War began.