The Ottoman Empire, also known as the Turkish Empire, was an empire founded in the 13th century in northwest Anatolia. After expanding into the Balkans between 1362 and 1389, the Ottoman Empire became a truly intercontinental imperial force. During the 16th and 17th century, Suleiman the Magnificent drastically increase the empire into Southeast Europe, Western Asia, the Caucasus, North Africa, and the Horn of Africa. During the peace era between 1740 and 1768, the Empire lost military prowess, and when World War 1 began, they were far behind their contemporaries, having lost much of their territory to the Allies. They were ultimately defeated, with much of their territory occupied at the end of World War I.
They were part of the "Triple Alliance" or "Central Powers", made principally of the Austro-Hungarian Empire, the German Empire, and the Ottoman Empire, with additional member Bulgaria. They were in opposition against the "Triple Entente" or "Allied Powers", made principally of the Russian Empire, France, the United Kingdom, the Kingdom of Italy, the Empire of Japan, and the United States of America.