The Iraq Survey Group (ISG) was a fact-finding mission sent by the multinational force in Iraq after the 2003 invasion of Iraq to find the weapons of mass destruction alleged to be possessed by Iraq that had been the main ostensible reason for the invasion. Its final report is commonly referred to as the Duelfer Report. It consisted of a 1,400-member international team organized by the Pentagon and Central Intelligence Agency to hunt for the alleged stockpiles of weapons of mass destruction, including chemical and biological agents, and any supporting research programs and infrastructure that could be used to develop WMD. The report acknowledged that only small stockpiles of chemical WMDs were found, the numbers being inadequate to pose a militarily significant threat.
The ISG was made up of more than one thousand American, British and Australian citizens, with the United States providing the bulk of the personnel and resources for the operation. These people included civilian and military intelligence and WMD experts, as well as a large number of people working to provide armed security and support. David Kay, who had been a weapons inspector after the first Gulf War, was chosen to head the group. The agency tasked as the head U.S. government agency of the ISG was a joint venture of the CIA and the Defense Intelligence Agency (DIA), a Department of Defense intelligence agency. Chosen as the senior military officer of the ISG was MG Keith Dayton, who was tasked TDY from his assignment as Deputy Director, Human Intelligence, Defense Intelligence Agency.