- This included the German Empire, the Austro-Hungarian Empire, and the Kingdom of Bulgaria.
- The Ottoman Empire entered the war in November 1914, after the German cruiser SMS Goeben and the battlecruiser SMS Breslau took refuge in the Dardanelles Strait.
- Britain and Russia, two of the Triple Entente powers, declared war on the Ottoman Empire in response.
- The Ottoman Empire fought on several fronts during the war, including the Gallipoli Campaign, the Caucasus Campaign, and the Mesopotamian Campaign.
- The Ottoman Empire was defeated in the war and signed the Armistice of Mudros in October 1918.
- As a result of the war, the Ottoman Empire lost control of much of its territory, including the Arab provinces and the Balkans.
- The empire was eventually dismantled in 1922, and the modern Republic of Turkey was established in its place.