diplomatic problem posed in the 19th and early 20th centuries by the disintegration of the Ottoman Empire, centring on the contest for control of former Ottoman territories. Any internal change in the Turkish domains caused tension among the European powers, each of which feared that one of the others might take advantage of the political disarray to increase its own influence. This question arose periodically during the 19th century—e.g., during the Greek revolution of the 1820s, in the Crimean conflict (1853–56), the Balkan crisis of 1875–78, the Bosnian crisis of 1908, and the Balkan Wars of 1912–13. The eventual distribution of the Ottoman territories was as follows: the Balkan provinces emerged in the course of the century as independent states, often under the influence of Russia or one of the other great powers; Britain occupied Cyprus in 1878 and Egypt in 1882 and acquired Palestine and Iraq as mandates after World War I; and France took over Syria and Lebanon in 1920. Turkey, the heart of the Ottoman state, won recognition as an independent republic in 1923.