World War II
In March 1938, Germany sent its army into Austria, known as the Anschluss, which had little reaction from European countries since nearly all Austrians wanted to be part of Germany. Soon, Western Europe agreed to give Sudetenland, the part of Czechoslovakia that was mostly German, to Germany if Hitler promised to stop taking land. However, the rest of the country had been forced to surrender or be invaded by March 1939. The Allies now tried to stop him by promising to help Poland if it was attacked. Just before the war, Germany and the Soviet Union signed a peace agreement that openly stated that they would not attack each other for ten years. Secretly, they also agreed to divide Eastern Europe between them.