The Allied powers in World War I (1914-1918) were primarily composed of France, the United Kingdom, Russia, and later the United States, among others. This coalition formed in opposition to the Central Powers, which included Germany, Austria-Hungary, and the Ottoman Empire. The Allied powers collaborated militarily and diplomatically to counter the aggressive tactics of the Central Powers, coordinating efforts in battles across multiple fronts. Ultimately, the collective strength and resources of the Allies, combined with strategic military decisions and the war exhaustion of the Central Powers, led to the defeat of Germany and its allies, reshaping the geopolitical landscape of Europe.