1. Germany: The principal power of the Central Powers, Germany was the driving force behind the war effort. It was responsible for the Schlieffen Plan, a strategy to quickly defeat France and then turn on Russia. Germany also had a powerful navy and a strong industrial economy.
2. Austria-Hungary: Austria-Hungary was a multinational empire that was composed of many different ethnic groups. It was a major power in Europe, but it was also burdened by a weak economy and political instability. Austria-Hungary's involvement in the war was largely due to its alliance with Germany.
3. Ottoman Empire: The Ottoman Empire was a Muslim empire that was based in Turkey. It was a declining power in the early 20th century, but it still controlled a vast amount of territory in the Middle East. The Ottoman Empire's involvement in the war was largely due to its desire to protect its territory and to maintain its independence.
4. Bulgaria: Bulgaria was a small country in the Balkans that was allied with Germany and Austria-Hungary. Bulgaria's involvement in the war was largely due to its desire to gain territory from its neighbors.