The document provides background information on World War 2. It describes how dictators like Hitler, Mussolini and Stalin rose to power in the 1930s in Germany, Italy and the Soviet Union. Hitler annexed Austria and parts of Czechoslovakia, ignoring the Munich Pact. In 1939, Germany invaded Poland, starting World War 2 in Europe. The US initially remained neutral but increased support for Britain. The bombing of Pearl Harbor in 1941 drew the US fully into the war on the side of the Allies against the Axis powers of Germany, Italy and Japan.