Civil-military relations in peace support operations can be represented in several dimensions: relations between external military forces and internal civilian authorities/society; between internal regular/irregular forces and external civilian agencies; and between the external military and civilian components of interventions. It is the last of these, the relationship between external military and civilian (exclusively humanitarian) actors in conflict environments, that provides the material for this discussion. This relationship is interesting because it has manifested a shift from detachment, suspicion and ignorance - in which interaction was based essentially on a duality of roles and culture - towards a level of civil-military cooperation (CIMIC) that is becoming institutionalised.