The foreign relations of the Ottoman Empire were characterized by competition with the Persian Empire to the east, Russia to the north, and Austria to the west. The control over European minorities began to collapse after 1800, with Greece being the first to break free, followed by Serbia. Egypt was lost in 1798–1805. In the early 20th century Austria-Hungary annexed Bosnia and Herzegovina, the Bulgarian Declaration of Independence soon followed. The Ottomans lost nearly all their European territory in the First Balkan War (1912–1913). The Ottoman Empire allied itself with the Central Powers in the World War I, and was defeated. During the war, the British successfully mobilized Arab nationalism, and the Ottoman Empire thereby lost its Arab possessions, and itself soon collapsed in the early 1920s.