The "İtilaf Devletleri," or the Allied Powers, were a coalition of countries that opposed the Central Powers during World War I. This alliance primarily included Britain, France, Russia, Italy, and later the United States. They worked together to defeat the Central Powers, which included Germany, Austria-Hungary, and Ottoman Empire. The İtilaf Devletleri played a crucial role in shaping the post-war world. After their victory in 1918, they participated in the Treaty of Versailles and other peace treaties, which aimed to establish new borders and political systems in Europe and the Middle East, significantly impacting global relations for decades to come.