The war ended 6-28-1919 at the signing of the Armistice at the Treaty of Versailles. The Allies imposed a series of peace treaties on the Central Powers. The 1919 Treaty of Versailles, ended the war. It declared Germany responsible for the war and required Germany to pay Reparations * The Rhineland will become a demilitarized zone. * German armed forces will number no more than 100,000 troops, and conscription will be abolished. * Enlisted men will be retained for at least 12 years; officers to be retained for at least 25 years. * German naval forces will be limited to 15,000 men, 6 battleships (no more than 10,000 tons displacement each), 6 cruisers (no more than 6,000 tons displacement each), 12 destroyers (no more than 800 tons displacement each) and 12 torpedo boats (no more than 200 tons displacement each). * The manufacture, import, and export of weapons and poison gas is prohibited. * Tanks, submarines, military aircraft, and artillery are prohibited. * Blockades on ports are prohibited.The negotiations at the Paris peace talks lasting 6 months for the war and the 14 points suggested and emphasized by President Woodrow Wilson. The United States never ratified the treaty.