The Central Powers, also known as the Central Empires, was one of the two main coalitions that fought in World War I (1914–1919). It consisted of the German Empire, Austria-Hungary, the Ottoman Empire, and the Kingdom of Bulgaria and was also known as the Quadruple Alliance. Colonies of these countries also fought on the Central Powers' side such as German New Guinea and German East Africa, until almost all of their colonies were occupied by the Allies.