- Treaty of Versailles: Signed on June 28, 1919, between the Allied Powers and Germany. It required Germany to accept full responsibility for starting the war, cede territories to the Allied Powers, pay reparations, and reduce its military strength.
- Treaty of Saint-Germain: Signed on September 10, 1919, between the Allied Powers and Austria. It led to the dissolution of the Austro-Hungarian Empire and established the independent Republic of Austria.
- Treaty of Neuilly: Signed on November 27, 1919, between the Allied Powers and Bulgaria. It required Bulgaria to cede territories to the Allied Powers and pay reparations.
- Treaty of Trianon: Signed on June 4, 1920, between the Allied Powers and Hungary. It led to the loss of two-thirds of Hungary's territory and required the payment of reparations.
- Treaty of Sevres: Signed on August 10, 1920, between the Allied Powers and the Ottoman Empire. It aimed to partition the Ottoman Empire and establish independent states in the Middle East.
- Treaty of Lausanne: Signed on July 24, 1923, between the Allied Powers and the Turkish Republic (successor state to the Ottoman Empire). It revised the Treaty of Sevres and established the modern borders of Turkey.