The Army Quarterly and Defence Journal was a British defence journal established in 1920 by Guy Dawnay and Cuthbert Headlam, both former British Army officers. It was known colloquially as the "AQ". Its early contributors included T. E. Lawrence (Lawrence of Arabia), Hugh Trenchard, and Basil Liddell-Hart, as well as junior officers. Later on it acted as a conduit for the dissemination of British Army orthodoxy among the armies of the British Empire, and as a forum for the discussion and questioning of British defence policy among the military of former colonies. Discussion of the failures and successes of the First World War gave way to articles about guerrilla warfare and counterinsurgency after the Second World War, and then to the concerns of the Cold War and nuclear age. Supplements were published titled The Army Quarterly Series and describing the defence forces of individual countries. It ceased publication in 1999.