The Ottomans conquered much of eastem Europe and nearly the whole of the Arab world, only Morocco and Mauritania in the West and Yemen, Hadramaut and parts of the Arabian peninsula remaining beyond their control.
They reached their zenith of power with Suleyman the Magnificent whose armies reached Hungary and Austria. From the 17th century onward with the rise of Westem European powers and later Russia, the power of the Ottomans began to wane. But they nevertheless remained a force to be reckoned with until the First World War when they were defeated by the Westem nations. Soon thereafter Kamal Ataturk gained power in Turkey and abolished the six centuries of rule of the Ottomans in 1924.