Tension in the western Balkans, which has been troubled by ethnic tensions since the wars of the 1990s, is becoming an increasing concern for the EU and Nato.
The Dayton accords in 1995 ended years of ethnic warfare in Bosnia, but more than 25 years later, the peace is holding but little else is. Serbian President Milorad Dodik wants out.
Recent threats by the Bosnian Serb leadership of dismantling the shared state institutions endanger the stability and security of Bosnia and Herzegovina.