"Cluster munitions are air-dropped or ground-launched weapons that release a number of smaller submunitions intended to kill enemy personnel or destroy vehicles. Cluster munitions were developed in World War II and are part of many nations' weapons stockpiles. Cluster munitions have been used frequently in combat, including the early phases of the current conflicts in Iraq and Afghanistan. Cluster munitions have been highly criticized internationally for causing a significant number of civilian deaths, and efforts have been undertaken to ban and regulate their use. The Department of Defense (DOD) continues to view cluster munitions as a military necessity but has instituted a policy to reduce the failure rate of cluster munitions to 1% or less by 2018. There are two major international initiatives to address cluster munitions: the Convention on Cluster Munitions (CCM) and negotiations under the U.N. Convention on Prohibitions or Restrictions on the Use of Certain Conventional Weapons (CCW). The Obama Administration has reiterated U.S. opposition to the CCM, which entered into force August 1, 2010, but is participating in negotiations regarding cluster munitions under the CCW."
CRS Report for Congress, RS22907