The Central Powers (German: Mittelmächte; Hungarian: Központi hatalmak; Turkish: İttifak Devletleri / Bağlaşma Devletleri; Bulgarian: Централни сили, translit. Tsentralni sili), consisting of Germany, Austria - Hungary, the Ottoman Empire and Bulgaria -- hence also known as the Quadruple Alliance (German: Vierbund) -- was one of the two main factions during World War I (1914 -- 18). It faced and was defeated by the Allied Powers that had formed around the Triple Entente. The Powers ' origin was the alliance of Germany and Austria - Hungary in 1879. The Ottoman Empire and Bulgaria did not join until after World War I had begun, although the Ottoman Empire retained close relations with both Germany and Austria - Hungary since the beginning of the 20th century.
who was on the central powers side in ww1
Germany Germany Germany Austria - Hungary Austria - Hungary Austria - Hungary Ottoman Empire Ottoman Empire Ottoman Empire Bulgaria Bulgaria Bulgaria