Frank Miller was a former US Green Beret, later Army Intelligence, and a resident of New York City. He was a veteran of Operation Desert Storm in 1991. He was a member of a Special Forces unit and was extensively trained in the tactics the unit used. His superior officers would later say that Miller believed that the United States should not have stopped until Iraqi dictator Saddam Hussein was killed. Miller would end up being twice passed over for promotion, and eventually left the Army.