When wars or armed conflicts end, or at least when violence on the ground decreases, hope for sustainable peace building grows. UN General Secretary Ban Ki Moon pointed out the importance of the immediate post?war period in a report to the Security Council on June 11, 2009: “The immediate post?war period offers a window of opportunity to provide basic security, deliver peace dividends, shore up and build confidence in the political process, and strengthen core national capacity to lead peace building efforts.” Ban Ki Moon talks about opportunities, but in my findings I found that an opportunity also presents challenges. A series of urgent needs have to be answered by local and external actors in the immediate post?war period. Three issues are on top of the agenda: disarmament, demobilization and reintegration of ex?combatants (DDR), rehabilitation of the economic and social infrastructure, and the reconstruction of social relations, and most of all mental support for victims. The aim of this study was to gain new knowledge about one of these challenges; the R-in DRR, and to what extent the reintegration can affect a post -war country.