The phenomenon of Iraq's Shia warlords and the militias they lead has significant implications for the conduct of the war against Islamic State in Iraq and Syria (ISIS), including for U.S. policy interests and for U.S. Landpower forces deployed in-country. In this monograph, Dr. Norman Cigar analyzes the rapid resurgence of the Shia militias and the warlords thanks to a mass popular mobilization in response to the severe ISIS threat to the country...