Records of the Chief of the (Imperial) General Staff and its directorates relating to responsibilities for military operations, intelligence and training.
Papers of the Office of the Chief of the Imperial General Staff are in WO 216.
Directorate(s) of Military Operations and Intelligence:
- Directorates of Military Operations and Intelligence, appreciation files, WO 190; collation files, WO 193; miscellaneous records, WO 106.
- Directorate of Military Intelligence, questionnaires completed by escapees, evaders and liberated Allied prisoners of war, WO 344; records during and after the Second World War, WO 208.
- Military intelligence papers, First World War, WO 160.
- Directorate of Military Survey and Survey Units, map and chart catalogues are in WO 401 with reports and conferences in WO 402.
- International Red Cross and Protecting Powers (Geneva): Reports concerning Prisoner of War Camps in Europe and the Far East, WO 224.
Geographical/survey directorates:
- Directorate of Military Survey, records of the topographical and geographical sections, WO 181; maps and air charts produced for the Air Ministry, WO 393; maps and chart catalogues, WO 401; General Staff Allocation Books and Receipt Books (Registers) are in WO 408.
- Maps, WO 252, WO 300, WO 301, WO 303 and WO 369.
- Photographs of Mulberry Harbour, WO 240.
- Survey Services: Directorate of Military Survey and Survey Units: technical instructions, WO 403.
- Map Library Day Books, WO 406.
- Historic Gazetteers, WO 407.
Other directorates:
- Directorate of Tactical Investigation, WO 232.
- Directorate of Air, WO 233.
- Directorate of Signals, WO 244.
- Directorate of Staff Duties, WO 260.
- Directorate of Weapons and Development, photographs, British atomic trials, Maralinga, Australia, WO 320.
- Inspectorate of Armaments, reports, WO 360.
- Directorate of Military Training, papers, WO 231.
Military training institutions:
- Royal Military Asylum for Children of Soldiers of the Regular Army, later Duke of York's Royal Military School, and Royal Hibernian Military School, WO 143.
- Royal Military Academy, Woolwich, registers of cadets, WO 149; correspondence and letter books, WO 150; miscellaneous books and records, WO 314.
- Royal Military College, Sandhurst, register of cadets, WO 151; correspondence and letterbooks, WO 152.
- Staff College Camberley, 1947 course notes on D-Day landings and ensuing campaigns, WO 223.
- Royal Military College Sandhurst, miscellaneous books and papers, WO 99, have been transferred to the Royal Military Academy Sandhurst.