The German Empire became the Weimar Republic. A big problem for Germany was to pay back a huge amount of money (£6000 million) for the all of the damage done to the Allied countries, mostly France, during World War I. That made Germany one of the poorest countries in Europe for almost 20 years and caused political fighting in Germany. Two important parties, the Communist Party, which wanted a communist revolution like in Russia, and the Nazis, who thought that Germany should become the most powerful country in Europe, fought for many years.