Serbia was conquered by the Turks in the 14th century, regaining independence in 1878. Serbian rivalry with the Austro-Hungarian empire contributed to the outbreak of the First World War, after which Serbia was absorbed into the kingdom of Serbs, Croats, and Slovenes （named Yugoslavia from 1929-2003）. In 1991-2 four out of the six Yugoslav republics seceded; Serbia became involved in armed conflict with neighbouring Croatia, the civil war in Bosnia, and the suppression of Albanian nationals in Kosovo. On the break-up of Yugoslavia it remained in federation with Montenegro until 2006.