1. Beginning of the war

Morning, September 1, 1939 the German army invaded Poland. Two days later Britain and France declared war on Germany. This marked the beginning of the war in Europe.
Germany had after World War large parts of its territory to other countries give. The Nazis wanted to return those areas, so that all Germans in a large and powerful Germany would live. After the First World War, Germany was not big and strong army. The countries that had won in 1918 wanted to prevent Germany ever again a war would start. Hitler's government still built a large army.