Short History of Ottoman Empire Wikepedia

By the early 15th century, a new power had arisen in western Anatolia, the Ottoman emirs, who in 1453 captured the Christian Byzantine capitol of Constantinople and made themselves sultans. The Mameluks held the Ottomans out of the Middle East for a century, but in 1514 Selim the Grim began the systematic Ottoman conquest of the region. Iraq was occupied in 1515, Syria in 1516 and Egypt in 1517, extinguishing the Mameluk line. The Ottomans united the whole region under one ruler for the first time since the reign of the Abbasid caliphs of the 10th century, and they kept control of it for 400 years.
The Ottomans also conquered Greece, the Balkans, and most of Hungary, setting the new frontier between east and west far to the north of the Danube. But in the west Europe was rapidly expanding, demographically, economically and culturally, with the new wealth of the Americas fuelling a boom that laid the foundations for the growth of capitalism and the industrial revolution. By the 17th century, Europe had overtaken the Muslim world in wealth, population and—most importantly—technology.
By 1700, the Ottomans had been driven out of Hungary and the balance of power along the frontier had shifted decisively in favour of the west. Although some areas of Ottoman Europe, such as Albania and Bosnia, saw many conversions to Islam, the area was never culturally absorbed into the Muslim world. From 1700 to 1918, the Ottomans steadily retreated, and the Middle East fell further and further behind Europe, becoming increasingly inward-looking and defensive. During the 19th century, Greece, Serbia, Romania, and Bulgaria asserted their independence, and in the Balkan Wars of 1912-13 the Ottomans were driven out of Europe altogether, except for the city of Constantinople and its hinterland.
By the 19th century, the Ottoman Empire was known as the "sick man of Europe", increasingly under the financial control of the European powers. Domination soon turned to outright conquest. The French annexed Algeria in 1830 and Tunisia in 1878. The British occupied Egypt in 1882, though it remained under nominal Ottoman sovereignty. The British also established effective control of the Persian Gulf, and the French extended their influence into Lebanon and Syria. In 1912, the Italians seized Libya and the Dodecanese islands, just off the coast of the Ottoman heartland of Anatolia. The Ottomans turned to Germany to protect them from the western powers, but the result was increasing financial and military dependence on Germany