Demobilization is defined as the formal and controlled discharge of active combatants from armed forces or other armed groups. The first stage of demobilization may extend from the processing of individual combatants in temporary centres to the massing of troops in camps designated for this purpose (cantonment sites, encampments, assembly areas or barracks). The second stage of demobilization encompasses the support package that is often provided to the demobilized, which is called reinsertion. Under this thematic area an analysis of the experiences related to different types of demobilisation approaches used – including encampment, non-encampment is made, and issues related to the spontaneous return of ex-combatants are explored. Lessons learned related to the registration of ex-combatants are specifically identified.