What WERE the two opposing sides called inww1?

In World War I, the two opposing sides were known as the Allies and the Central Powers. The Allies primarily included countries like France, the United Kingdom, Russia, Italy, and later the United States, while the Central Powers consisted mainly of Germany, Austria-Hungary, the Ottoman Empire, and Bulgaria. These alliances were formed based on shared interests and mutual defense agreements. The conflict lasted from 1914 to 1918, resulting in significant geopolitical changes.