1. Ottoman Empire: The Ottoman Empire, which had controlled much of the Middle East and North Africa, was dismantled after its defeat in the war. Its territories were divided among the victorious Allied powers, with Britain and France taking control of large parts of the region.
2. Austro-Hungarian Empire: The Austro-Hungarian Empire, which had been a major power in Europe, collapsed and split into smaller nation-states, including Austria, Hungary, Czechoslovakia, and Yugoslavia.