Brčko (, ) is a city and the administrative seat of Brčko District, in northern Bosnia and Herzegovina. It lies on the banks of Sava river across from Croatia. As of 2013, it has a population of 39,893 inhabitants. De jure, the Brčko District belongs to both entities of Bosnia and Herzegovina (the Federation of Bosnia and Herzegovina and Republika Srpska) but in practice it is not governed by either; practically, Brčko is a self-governing free city. Name Its name is very likely linked to the Breuci (Greek Βρεῦκοι), a subtribe of Pannonian tribes of the Illyrians who migrated to the vicinity of today's Brčko from the territories of the Yamnaya culture in the 3rd millennium BC. Breuci greatly resisted the Romans but were conquered in 1st century BC and many were sold as slaves after their defeat. They started receiving Roman citizenship during Trajan's rule. A number of Breuci migrated and settled in Dacia, where a town called Bereck or Brețcu, a river (Brețcu River) and a mountain Munții Brețcului in today's Romania were named after them. Geography The city is on the north, riparian border of Bosnia, across the Sava River from the village of Gunja in Croatia. Brčko is the seat of the Brčko District, an independent unit of local self-government created on the territory of Bosnia and Herzegovina following an arbitration process. The local administration was formerly supervised by an international supervisory regime headed by Principal Deputy High Representative who is also ex officio the Brčko International Supervisor. This international supervision was frozen since 23 May 2012. History Brčko was a geographic point of contention in 1996 when the U.S.-led Implementation Force (IFOR) built Camp McGovern on the outskirts of the city. Camp McGovern under the overwatch of 3-5 CAV 1/BDE/1AR Division (US) commanded by LTC Anthony Cucolo was constructed from a war torn farming cooperative structure in the Zone of Separation (ZOS) for the purpose of establishing peacekeeping operations. The mission was to separate the forming warring factions. The ZOS was one kilometer wide of no man's land, where special permission was required for Serbian or Bosnian forces to enter. Various checkpoints and observation points (OP's) were established to control the separation. Although Brčko was a focal point for tension in the late 1990s, considerable progress in multi-ethnic integration in Brčko has since occurred including integration of secondary schooling. Reconstruction efforts and the Property Law