The purpose of the Treaty of Versailles, outside of establishing guidelines for continued peace, was to put strict treaty obligations on Germany in hopes of preventing further war and make the country pay reparations for the damages caused during the war. One of the key points of the treaty was the War Guilt Clause, making Germany accept that they held complete responsibility for initiating World War I.
Germany was forced to give up much of the territory that it had gained in the years of the war. Land was conceded back to France, Belgium, Czechoslovakia and Poland. The country's army was limited to a maximum of 100,000 men and the navy could not have any boats over 100,000 tons.