In the 19th century, European colonization of the Muslim world coincided with the French conquest of Algeria (1830), the fall of the Mughal Empire in India (1857), the Russian incursions into the Caucasus (1828) and Central Asia (1830-1895), and ultimately in the 20th century with the defeat and dissolution of the Ottoman Empire (1908–1922), to which the Ottoman officer and Turkish revolutionary statesman Mustafa Kemal Atatürk had an instrumental role in ending and replacing it with the Republic of Turkey, a modern, secular democracy (see Abolition of the Caliphate, Abolition of the Ottoman sultanate, Kemalism and Secularism in Turkey).