The document summarizes the key events leading up to World War 2, including Hitler's rise to power in Germany and his aims of expanding German territory, abolishing the Treaty of Versailles, and destroying Communism. It then outlines Hitler's "steps to war" through remilitarization of Germany, annexation of Austria and the Sudetenland, and invasion of Poland, despite the policy of appeasement by Britain and France. War broke out in Europe in 1939 when Britain and France declared war on Germany after it invaded Poland.