Peace talks near dayton, ohio in 1995 bring an end to civil war in

Bosnia

The end of the civil war saw the state of Bosnia divided into two regions.
Bosnia remained as a single state, but was to be made up of two parts:  the Bosnian Serb Republic and the Bosniak-Croat Federation of Bosnia and Herzegovina.  Sarajevo was kept as the capital city for the whole nation.  
The Dayton Agreement (also called the Dayton Accords) got that name because the negotiations for the agreement occurred at an air force base outside of Dayton, Ohio, in the United States.  The full official name of the agreement was the General Framework Agreement for Peace in Bosnia and Herzegovina.