Big Four, who were Wilson, Georges Clemenceau, David Lloyd George and Vittorio Orlando, dew up the Treaty of Versailles. The treaty of Versailles brought about the end of World War I. This treaty was designed to humiliate the Germans and the German government was forced to sign this unfair treaty.
Germany had to accept the blame for the loss and damage, which the Allied Government and their nationals have been subjected to as a consequence of the war imposed on them by the aggression of Germany and her allies. In other words, Germany was to accept full blame for starting the war.
The Germans were seen responsible for the war and they were made to pay for it. Despite of Germany's economic problems, they were still made to pay compensation, which was partly in goods and partly in huge amounts of money. In order to prevent Germany from starting the war again, its army and navy were kept small so that it would be too weak to fight another war.
Besides that, Germany was also forbidden to have an air force or to build tanks. Germany also lost all of its colonies and all of its colonies would be run by one of the victorious powers until they were ready to gain independence.
The treaty of Versailles was too harsh for Germany and later on, it caused more problems.