Taken by the Austro-Hungarians in 1878, it became a centre of Slav opposition to Austrian rule. It was the scene in June 1914 of the assassination by a Bosnian Serb named Gavrilo Princip of Archduke Franz Ferdinand (1863–1914), the heir to the Austrian throne, an event which triggered the outbreak of the First World War. The city suffered severely from the ethnic conflicts that followed the break-up of Yugoslavia in 1991, and was besieged by Bosnian Serb forces in the surrounding mountains from 1992 to 1994