Cluster munitions have been a persistent problem for decades. These weapons have killed or injured tens of thousands of civilians in war-affected countries. In May 2008, more than 100 States adopted the Convention on Cluster Munitions, which prohibits the use, development, production, stockpiling and transfer of such munitions. It also requires States Parties to destroy their stockpiles, clear remnants, and assist victims. This brochure provides an overview of the cluster munitions problem, the main provisions of the Convention and the steps required to meet its commitments.