The Ottoman Empire, which had ruled over the Middle East and North Africa for centuries, was defeated by the Allied Powers during World War I. As a result, the Ottoman Empire was dismantled, and its territories were divided among the victorious powers.
2. Austro-Hungarian Empire
The Austro-Hungarian Empire, which was a major power in Central Europe, was also defeated by the Allied Powers during World War I. The Austro-Hungarian Empire was dissolved, and its territories were divided among the victorious powers.
3. German Empire
The German Empire, which had been the dominant power in Europe for much of the 19th century, was defeated by the Allied Powers during World War I. The German Empire was replaced by the Weimar Republic, which was a much weaker state.
4. Russian Empire
The Russian Empire, which had been a major power in Europe and Asia, was overthrown by the Bolsheviks in 1917. The Russian Empire was replaced by the Soviet Union, which was a communist state.
The collapse of these empires had a profound impact on the world. It led to the creation of new nation-states, the rise of communism, and the Cold War.