The US Army Field Manual on Interrogation, sometimes known by the military nomenclature FM 34-52, is a 177-page manual describing to military interrogators how to conduct effective interrogations while conforming with US and international law. It has been replaced by FM 2-22.3 Human Intelligence Collector Operations.
During the American war on terror, Secretary of Defense Donald Rumsfeld issued "enhanced interrogation techniques" that went farther than those authorized in the Army Field Manual. The extended techniques stimulated debate both within the Bush administration and outside it. Various revisions of the extended techniques were issued.
Rumsfeld intended the extended techniques to be used only on the captives the United States classified as "illegal combatants". However, extended interrogation techniques were adopted in Iraq, even though captives there were entitled to protection under the Geneva Conventions. General Geoffrey Miller, who was then the director of interrogation of detainees held in Guantanamo Bay, and some of his staff were sent to Iraq to help transfer their interrogation experience. Military intelligence troops had been using extended techniques in Afghanistan, notably Captain Carolyn Wood. General Ricardo Sanchez, the commander of American ground forces in Iraq, issued his own set of extended techniques after input from Miller and his team, and from Captain Wood.
On July 25, 2005, Senator John McCain – a POW and torture victim during the Vietnam War – submitted an amendment to a military spending bill, intended to restrict all US government interrogators from using interrogation techniques not authorized in the Army Field Manual.