The Serbs of Bosnia and Herzegovina are one of the three constitutive nations of the country, predominantly residing in the political-territorial entity of Republika Srpska. In the other entity Federation of Bosnia and Herzegovina Serbs form the majority in Drvar, Glamoč, Bosansko Grahovo and they are frequently referred to as Bosnian Serbs in English, regardless of whether they are from Bosnia or Herzegovina. They are also known by names such as Krajišnici, Semberci, Bosanci, Hercegovci. The 2013 population census registered 1,086,733 Serbs or 30. 8% of the population of Bosnia. Bosnian Serbs are the most territorially widespread nation of Bosnia and Herzegovina, the vast majority live on the territory of the Republika Srpska, where they constitute around 88% of population. The majority of Bosnian Serbs are adherents of the Serbian Orthodox Church, the Serbs of Bosnia and Herzegovina speak the Serbian language in its Ijekavian accent, similar to that of Serbs of Montenegro and Croatia, and also to the language of Bosniaks and Bosnian Croats. Slavs settled the Balkans in the 6th and 7th centuries, according to De Administrando Imperio, the Serbs had settled what is now Bosnia and Herzegovina. They inhabited and ruled Serbia, which included Bosnia, and the principalities of Travunija, Zahumlje and Paganija. Serbia was at the time ruled by the Vlastimirović dynasty, during the rule of Mutimir, the Serbs were Christianized. Prince Petar, defeated Tišemir in Bosnia, annexing the valley of Bosna, Petar took over the Neretva, after which he seems to have come into conflict with Michael, a Bulgarian vassal ruling Zahumlje. Časlav defeated the Magyars on the Drina river banks when protecting Bosnia, however, after his death, Duklja emerged as the most powerful Serb polity, ruled by the Vojislavljević dynasty. Constantine Bodin installed his relative Stefan as Ban of Bosnia, next, the Nemanjić dynasty acquired the rule of the Serbian lands. With the establishment of the autocephalous Serbian Church, Archbishop Sava founded the Metropolitanate of Zahumlje, with the Ottoman conquest of medieval Serbia, there were large migrations towards Bosnia and Herzegovina. The Serb Uprising of 1596–97 was suppressed at Gacko, in 1809, Jančićs Revolt broke out in Gradiška. In 1834, Priest Jovicas Revolt broke out in Gradiška, in 1858, Pecijas First Revolt broke out in Knešpolje. In 1875, the Herzegovina Uprising broke out in the Bosnia Vilayet, on July 2,1876, Golub Babić and his 71 commanders signed the Proclamation of the Unification of Bosnia with Serbia. In 1878, Bosnia and Herzegovina became a protectorate of Austria-Hungary, the first parliamentary elections in Bosnia and Herzegovina were held in 1910, the winner was Serbian National Organization. On June 28,1914, Bosnian Serb Gavrilo Princip made international headlines after assassinating Arch Duke Francis Ferdinand in Sarajevo and this sparked World War I leading to Austria-Hungarys defeat and the incorporation of Bosnia and Herzegovina into the Kingdom of Yugoslavia …