World War I involved the Allies fighting Germany and Austria-Hungary.
Central Powers . It faced and was defeated by the Allied Powers that had formed around the Triple Entente , after which it was dissolved . The Powers ' origin was the alliance of Germany and Austria-Hungary in 1879 . World War I . In November 1914 , the Ottoman Empire joined the Central Powers , opening fronts in the Caucasus , Mesopotamia and the Sinai .