 The incident elicited mixed internal responses, as resistance and scepticism toward the use of heavy artillery and tanks as components of peacekeeping missions had always been raised by parts of the UN, whilst other parts had proven willing to approve the use of such force.In the aftermath of Operation Bøllebank, UN headquarters in Zagreb, Croatia began investigating whether the Danes had broken the “Rules of Engagement” in place through excessive use of force.A debriefing showed that Danish forces only opened fire after having been first fired upon, and still only after a significant waiting time.