(1785-1839) Ottoman sultan from 1808 who attempted to westernize the declining empire, carrying out a series of far-reaching reforms in the civil service and army. The pressure for Greek independence after 1821 led to conflict with Britain, France, and Russia, and he was forced to recognize Greek independence 1830.
In 1826 Mahmud destroyed the elite janissary army corps. Wars against Russia 1807–12 resulted in losses of territory. The Ottoman fleet was destroyed at the Battle of Navarino 1827, and the Ottoman forces suffered defeat in the Russo-Turkish war 1828–29. There was further disorder with the revolt in Egypt of Mehmet Ali 1831–32, which in turn led to temporary Ottoman-Russian peace. Attempts to control the rebellious provinces failed 1839, resulting in effect in the granting of Egyptian autonomy.