Before the 20th century, Crimean Tatars had immigrated from Crimea to Turkey in three waves: First, after the Russian annexation of Crimea in 1783; second, after the Crimean War of 1853-56; third, after the Russo-Turkish War of 1877–78. The official number of Crimean Tatars is 150,000 (in the center of Eskişehir) but the real population (in the whole of Turkey) may be a few million. They mostly live in Eskişehir Province and Kazan-Ankara.