The document discusses the start of World War II. It describes how Hitler rose to power in Germany in 1933 and established the Nazi regime. It outlines Germany's increasing violations of the Treaty of Versailles, including remilitarizing the Rhineland and annexing Austria and Czechoslovakia. This emboldened Germany and led to the invasion of Poland in 1939, marking the start of World War II. The document then discusses the early victories of Germany using its blitzkrieg tactics, as it quickly conquered Western European countries like France. Britain remained as the sole holdout against Hitler in Europe by 1940.