One aspect of particular concern is sexual violence in armed conflict or post-conflict situations, as that subject cannot be approached simply from a gender perspective. The impact on society of sexual violence used as a tactic of war is so great that addressing it must be an integral part of any strategy for peace and security. Sexual violence encourages the perpetuation of conflicts, promotes the displacement of populations and limits development opportunities. Certain groups, such as displaced persons, refugees and persons with disabilities, are particularly vulnerable to such crimes and require special attention.