The trafficking of firearms and their use in criminal violence in Europe has received significant attention from researchers and policymakers. Less is known, however, about the illicit proliferation of firearm ammunition and other explosive munitions. Currently, detailed data on illicit munitions in Europe can only be accessed through specialized law enforcement agencies. National seizure statistics often lack the necessary detail for policy-relevant analysis, as do the media reports, which often include incomplete or inaccurate information on the types and calibres of ammunition. 

Unplanned explosions at munitions sites (UEMS) are accidental explosions of abandoned, damaged, improperly stored, or properly stored stockpiles of ammunition and explosives at munitions sites. UEMS are a persistent and global problem. They are a significant safety concern for the public and a major security challenge for states and societies. Addressing the challenge posed by UEMS requires not only putting in place effective stockpile management practices but also implementing a life-cycle management of ammunition (LCMA) system.

Unplanned explosions at munitions sites (UEMS) remain a global and multi-faceted problem. UEMS are accidental explosions of abandoned, damaged, improperly or properly stored stockpiles of ammunition and explosives at munitions sites.