Edition of A Gazetteer of Greece published by the Permanent Committee on Geographical Names for the Admiralty and War Office (House of the Royal Geographical Society, London, 1942). Also, official 1945 edition of RAF Map Catalogue containing lists of maps of Europe, the Middle East and the Far East held by the RAF and published by Directorate of Military Survey, Middle East; Directorate of Survey, Geographical Section General Staff, India; the Australian Survey Corps; the Aeronautical Chart Service; US Army Air Forces; and the Army Map Service, US Army. Book of maps published by the Institute for Army Education relating to the British campaign in Burma, 1942-1945, and including maps of Northern Arakan, the Assam Front, the Kohima Sector, the Imphal Sector, the Irrawaddy, and campaigns in Burma and Eastern India, 1942-1945. Ministry of Defence map and air chart sales catalogue containing details of all maps and aeronautical chart series released for sale to the public by the Ministry of Defence, including world surface maps, aeronautical topographical and planning charts, and special navigational charts, 1968- 1971.

Papers relating to Watts' RN career, training of RN Engineers and meteorology, 1945-1990, including three telegrams relating to the German and Japanese surrenders, May and Aug 1945, and to the signing of the Japanese surrender, Tokyo Bay, Japan, Sep 1945; lectures and talks by Watts relating to RN Engineer training, 1960-1962; typescript lecture notes entitled 'The Instructor Branch' [1961]; typescript address to Royal Naval Reserve Instructor Officers, [1964]; correspondence with R Adm Sir William (Alfred) Bishop, R Adm Christopher John Howard, Capt John Athol Burnett, RN, Capt Arthur Ernest Johnston, RN, Capt Alexander Malcolm Morrice, RN, Cdr William Nimmo Bowman, RN, and Richard J Ogden, Apr-Nov 1988, relating to research for a lecture by Watts on 'Meteorology in the Royal Navy in World War Two' to the History Group of the Royal Meteorological Society, Oct 1988, with edition of Meteorology and World War II. Second conference, October 1988, edited by Brian Douglas Giles (Royal Meteorological Society, School of Geography, University of Birmingham, Birmingham, 1989); typescript account of German bombing of HMS ILLUSTRIOUS off Pantelleria, Mediterranean, 10 Jan 1941, entitled 'A day to remember', with two sketch maps of the operation [1990]; typescript lecture notes on the organisation of the RN Meteorological Service in World War Two [1990].

US Strategic Bombing Survey, Civil Defense Division, report entitled Target Report of Civilian Defense Division Field Team No 82, covering air-raid protection facilities and allied subjects in the city of Hamburg, Germany, 1945. The report is in two volumes. The first volume contains the field report of the US Strategic Bombing Survey, Civil Defense Division, and includes information on the organisation and operation of German civil defence, including fire control and incident control precautions; German passive defence installations and precautions, including gas protection and camouflage; information on German evacuation techniques and civil defence training measures. The second volume contains photographic, manuscript, and typescript exhibits for the first volume. Included in the second volume are population figures of Hamburg, 1940-1945; damage statistics for dwellings, cultural buildings, and industrial buildings, 1940-1945; statistics on those killed during the bombing of Hamburg, 1940-1945; organisation of German anti-aircraft divisions; organisational chart of German air raid personnel; photographs of oil refinery and storage fires caused during Allied bombing raids in Jul 1943; photographs of civilians killed during Allied bombing raid in Jul 1943; translation of German instructional regulations on how to handle the dead; report on the activities of German medical and emergency personnel; statistics on the heavy raids on Hamburg, 24 Jul-3 Aug 1943; reports of interviews with German civil servants, police and fire personnel, and air defence personnel.

Microfilm collection containing copies of meeting minutes of the major conferences of the Combined Chiefs of Staff, 1941-1945. Meeting minutes include those for the conference held at Washington, DC, codenamed ARCADIA, at which Anglo-American planners first formed a combined strategy for the prosecution of the war, 22 Dec 1941-14 Jan 1942; the conference at Casablanca, Morocco, codenamed SYMBOL, during which the Anglo-American Combined Chiefs of Staff (CCS) first discussed the policies of German unconditional surrender, the Combined Bomber Offensive from Great Britain against Germany and the establishment of the French National Committee for Liberation, 14-24 Jan 1943; the Allied conference held at Washington, DC, codenamed TRIDENT, at which President Franklin Delano Roosevelt, Prime Minister Rt Hon Sir Winston Leonard Spencer Churchill, and the Combined Chiefs of Staff (CCS)discussed the decision to delay the invasion of France until May 1944, the Italian surrender, and the Battle of the Atlantic, 11-25 May 1943; the Allied conference at Quebec City, Canada, codenamed QUADRANT, at which the Allies endorsed a plan for the invasion of the Normandy coast in France, formed a new theatre of war, South-East Asia Command, with Acting Adm Lord Louis (Francis Albert Victor Nicholas) Mountbatten as Supreme Allied Commander, and regulated the procedures for co-operation between Great Britain and the US regarding the development and production of the atomic bomb, 12-24 Aug 1943; the Allied conferences at Cairo, Egypt, codenamed SEXTANT, at which the Allies discussed combined operations in South-East Asia with Generalissimo Chiang Kai-shek's Chinese forces, 22-26 Nov and 2-7 Dec 1943; the Allied conference at Teheran, Iran, codenamed EUREKA, during which the Allies first co-ordinated future strategy with Soviet Prime Minister Joseph Vissarionovich Stalin, including plans to coincide military operations against Germany in France and the Soviet Union in May 1944, 28-30 Nov 1943; the conference at Quebec City, Canada, codenamed OCTAGON, at which the Allies discussed the post-war division of Germany and a plan for its de-industrialisation, 12-16 Sep 1944; the conferences at Malta and Yalta, Soviet Union, codenamed ARGONAUT, at which the Allies discussed the division of post-war Germany, the occupation of Germany and Austria, Soviet involvement in the war against Japan, and the future government and frontiers of Poland, 30 Jan-9 Feb 1945; the conference at Potsdam, Germany, codenamed TERMINAL, during which surrender terms for Japan were discussed, the boundaries and peace terms for Europe were determined and Poland's government and frontiers were debated, 16 Jul-2 Aug 1945. Conference minutes include references to Allied production and assignment of war materials; British and US merchant vessel losses; US policy concerning assignments of Lend-Lease military aircraft, naval vessels and munitions to Great Britain; Allied petroleum supplies; propaganda and unconventional warfare; war crimes and prisoners of war; operational reports concerning the planning and conduct of Allied offensive operations in Europe, including the invasion of North Africa, codenamed Operation TORCH, Nov 1942; the invasion of Sicily, Italy, codenamed Operation HUSKY, Jul 1943; the US preparation for the invasion of Europe, codenamed Operation BOLERO; and the Allied invasion of Europe, codenamed Operation OVERLORD, Jun 1944; operational reports concerning the Japanese war economy; Japanese Imperial Army logistical capabilities; locations and strengths of Japanese forces in the Pacific; British participation in long range bombing of Japan; Allied operational efforts in Burma, India, Malaya, and the Philippines; Soviet claims on the Sakhalin and Kuril islands; the co-ordination of Allied strategic plans for the defeat and occupation of Japan, 1943-1944; Soviet military action to facilitate Operation OVERLORD; liaison between Allied theatre commanders and the Soviet Army; Soviet capabilities with reference to the Far East; US Lend-Lease requirements for the Soviet Union; and estimates of Soviet post-war capabilities and intentions, 1943-1945.

Typescript text of talk by Tyrrell to Wimbledon Literary and Scientific Society [1985], entitled 'Some recollections of a prisoner of war of the Japanese', relating to his experiences as a POW in Zentsuji Camp, Shikoko Island, Japan, 1942-1945. Copies of eight certifications on Tyrrell by Commanding Officers of RN ships and establishments, 1933-1955, with copy of Tyrrell's Mention in Despatches citation for service on HMS ENCOUNTER, Mar 1942, copy of letter relating to the award of the Dutch Order of Orange Nassau, Aug 1948, and copy of newspaper cutting relating to Tyrrell's wedding, Dec 1947. Typescript address by R Adm William Terence Colborne Ridley at Tyrrell's memorial service, Jan 1995.

Harry S Truman Presidential Oral History Files is a themed microfiche collection composed of transcribed interviews relating to the professional career of Harry S Truman. From 1961 to 1989, the Harry S Truman Library conducted over 400 interviews for the oral history project, each relating to aspects of Truman's professional life, including his career as an artillery officer during World War One; district judge, 1922-1934; US Senator, 1934-1944; and President of the United States, 1945-1953. Included among the interviewees are Dean Acheson, US Secretary of State, 1949-1953; Konrad Adenauer, Chancellor, Federal Republic of Germany, 1949-1963; Richard Bolling, First Secretary, Office of US Political Adviser to the Supreme Commander for the Allied Powers, Tokyo, Japan, 1950; John H Chiles, Secretary, General Staff of the Far East Command, and Supreme Commander for the Allied Powers, 1948-1950; Clark McAdams Clifford, Special Counsel to the President, 1946-1950; 1st Lt Lorain H Cunningham, 129 Field Artillery, US Army, 1917-1918; Edgar C Faris, Jr, Secretary to Truman as Senator of Missouri, 1935-1938; Abraham Feinberg, friend of Truman, active in the creation of the State of Israel, 1945-1948; Raymond W Goldsmith, economist, US Department of State, 1947-1949; Gordon Gray, Secretary of the Army, 1949-1950 and Special Assistant to the President, 1950; (William) Averell Harriman, US Ambassador to the Soviet Union, 1943-1946 and to Great Britain, 1946, Special Assistant to the President, 1950- 1951, and Chairman, NATO Commission on Defence Plans, 1951; Edwin A Locke, Jr, Personal Representative of the President to China, 1945, Special Assistant to the President, 1946-1947, and Ambassador in Charge of US Mission to the Near East, 1951-1952; Robert Abercrombie Lovett, US Secretary of Defense, 1951-1953; Sir Roger Mellor Makins, British Deputy Under Secretary of State, 1948-1952, and British Ambassador to the United States, 1953-1956; and Earl Warren, Chief Justice of the United States, 1953-1969

Potsdam Conference Documents, 1945: The Presidential Documents Series is a themed microfilm collection including the personal and official documents and correspondence of President Harry S Truman during proceedings of the Potsdam Conference, 29 Mar-2 Aug 1945. Papers are drawn from a variety of originating bodies including US President Harry S Truman; US Gen of the Army George Catlett Marshall; US Gen of the Army Douglas MacArthur; Gen Dwight David Eisenhower, Supreme Commander Allied Forces Europe; George Frost Kennan, US Chargé d'affaires in Moscow; Rt Hon Winston (Leonard Spencer) Churchill, Prime Minister of Great Britain (until 26 Jul 1945); Rt Hon Clement Richard Attlee, Prime Minister of Great Britain (after 28 Jul 1945); Generalissimo Chiang Kai-shek; Soviet Premier Joseph Vissarionovich Stalin; the US Joint Chiefs of Staff; and the Combined Chiefs of Staff. Papers relate to US foreign policy concerning the reconstruction of Western Europe; the partition, de-nazification, demilitarisation, and future reparations payments of Germany; the trial of major war criminals; the unconditional surrender of Japan; former Axis satellite states; Austria; Yugoslavia; the withdrawal of Allied forces from Iran; the retention of Allied forces in Italy; Lend-Lease liquidation; Bulgarian reparations payments to Greece; the reconstruction of Poland, Czechoslovakia; Yugoslavia and the Balkans; Anglo-Soviet rivalry in the Middle East; civil affairs in China.

Unpublished typescript memoirs, 1893-1969, including: accounts of life in the British colony in St Petersburg before World War One; work in the British Military Mission at the Russian War Office; events witnessed during the Russian Revolution and conditions for the Russian Army during the Revolution, 1917-1918; evacuation of British personnel from Russia, February 1918; negotiating with Finnish Red and White commanders while travelling through Finland during the Civil War; liaising with Admiral Aleksandr Vasiliyevich Kolchak and the White armies in Harbin, China, 1918; liaising with General Mikhail Konstantinovich Dieterichs, Czechoslovak Legions, and a special mission to Ataman Grigory Mikhaylovich Semyonov (or Semenov) in Chita, Transbaikalia, November 1918; activities as General Sir Harry Knox's liaison officer at the White Army Headquarters in Omsk, November 1918 - November 1919; the retreat from Omsk to Vladivostock following the success of the Bolshevik army, November 1919 - March 1920; stationing in Gibraltar and Egypt, 1921-1922; life and work in Simla, Waziristan and Kamptee, India, 1922-1928; work as an intelligence officer, Meshed, Persia (Iran), 1928-1931; life and work in Bombay, Ajmer, Jhansi, Alwar and Delhi, India, 1932-1935, including description of rioting under the Maharajah of Alwar; experiences working in India, China and Egypt during World War Two, including visit to Palestine; account of working in the post-war timber trade and as a consultant in the Russian Section of the London Chamber of Commerce. Also article 'Anglo-Russian Timber Trade: Personal Reminiscences and Reflections of Col L Steveni', The Timber Trades Journal , 11 March 1961, and article by Richard J Aldrich, University of Nottingham, from Modern Asian Studies 32, 1 (1998), pp. 179-217, entitled "Britain's Secret Intelligence Service in Asia during the Second World War" including analysis of Steveni's role as Director of British Secret Intelligence Service (SIS) in Asia.

Papers relating to his military career, 1939-1962, principally his service in Burma, 1939-1941, UK, 1941-1943, North Africa, 1943, Italy, 1943-1944, and Korea, 1955-1956, notably including battalion orders for 2 Bn, Sherwood Foresters, 1945; German propaganda leaflets for US and Allied troops, [1944]. 'An ancient Yorkshire family', a history of the Slingsby family, written by Slingsby in 1989.

Self-published edition of Chinese Ink and Brush Sketches of Prisoner of War Camp Life in Hong Kong (Hong Kong, 1948) by Lt Alexander V Skvorzov, Hong Kong Volunteer Defence Force [1941-1945], including fourteen ink and brush sketches drawn by the author whilst he was a prisoner of war in Hong Kong, 1943-1945

Papers relating to his service in the Far East in 1942-1945 and 1950, dated 1942-1945 and 1950, principally comprising two photograph albums of Keijo (Seoul) POW camp, 1942-1944; copy of obituary from The Lancashire Lad, North Lancashire Regt (Loyal Regt) journal (Dec 1950); copy of covering letter to the Centre from Joan Procter (Procter's sister), 1992.

Papers relating to his civil and military career, 1940-1949, dated 1940-[1955], notably including typescript text concerning his service with the Royal Air Force Volunteer Reserve, Malaya, 1942, dated [1945-1955]; photographs of Morriss and other POWs, Java and Japan, [1942-1943]; notes relating to his life as a POW, [1942-1945]; newsletters of the Java Fellowship, an organisation for families of RAF personnel missing in Java, 1943-1946; issues of Far East , the official journal of the Far East Section of the Red Cross and St John War Organisation Prisoners of War Department, 1944-1945; 'Publicity in connection with escaped, liberated or repatriated Prisoners of War', restricted circulation circular from General HQ, US Army Forces, Pacific, 1945; 'Homeward bound', pamphlet giving information about the 5th Replacement Depot, a processing camp for liberated POWs near Manila, Philippine Islands, [1945].

Papers relating to his medical career with the RN, 1939-1952, dated 1908, [1943]-1950, principally comprising typescript texts written as Chief Malariologist with the British Pacific Fleet, [1943-1946], including accounts of his work in Singapore, Hong Kong and Pacific Islands; typescript texts by Mockler and others on malaria and its treatment, [1943-1946]; official annual reportsas Naval Medical Officer of Health, Hong Kong, 1951-1952; lecture notes circulated at the RN Medical School, Alverstoke, to accompany a course on radiological defence, [1947]; British, Australian and US military publications on health and medical issues, 1942-1950, mainly malaria and tropical diseases.

Copy of affidavit 'In the matter of war crimes committed by Japanese nationals and in the matter of ill-treatment of prisoners of war (civilian internees) at Heito, Formosa, Prisoner of War Camp', describing his experiences as a POW in Formosa (Taiwan) and China, 1942-1945, 1946.

Two official Admiralty photographs of the Hong Kong Surrender Ceremony, 1945.

Certificates, notifications of appointments and typescript curriculum vitae relating toLindsay-Young's career, 1914-1944, with printed article by Capt John Stewart Noall Bernays entitled 'The Sudan troubles of 1924' from The Green Tiger, May 1933. Typescript account of Lindsay-Young's service in Ireland during the Anglo-Irish War, 1920-1922, entitled 'Under the shadow of darkness-Ireland 1920'. Typescript text of lecture by Lindsay-Young relating to hisservice as Commanding Officer, 1 Bn, Leicestershire Regt, Malaya, 1941-1942, with printed map of Malaya, 1938, annotated by Lindsay-Young with events in the Malayan campaign, 1941-1942. Typescript account by Lindsay-Young of his service with Headquarters, 4 Line of Communication Sub Area, British Liberation Army, from Lille, France, Sep 1944, to Berlin, Germany,Aug 1945. Papers relating to Lindsay-Young's service in Belgium, 1944, including typescript memorandum on the reporting of German atrocities, Sep 1944; typescript 'Brussels garrison refugee plan' outlining procedures to be adopted if German forces advance towards Brussels [Dec 1944]. Papers relating to the Potsdam Conference, Germany, codename TERMINAL, on thesurrender terms for Japan, and the boundaries and peace terms for Europe, Jul-Aug 1945, including manuscript and typescript notes for an article on the Potsdam Conference by Lindsay-Young [1945]; typescript 'Report on Operation TERMINAL, 12th June-15th August, 1945' by Brig Owen Murton Wales, commanding 4 Line of Communication Sub Area, with thirteenuncaptioned photographs relating to the Potsdam Conference, Germany, 1945. Papers, photographs and newspaper cuttings relating to Lindsay-Young's service in the Control Commission for Germany, Berlin and Flensburg, 1945-1948, including sixty five mostly uncaptioned photographs of Berlin and Potsdam, Germany, May-Jun 1945; typescript notes entitled 'Group commanders conference, Kiel',Jun 1947; letter to Lindsay-Young from AVM Hugh Vivian Champion de Crespigny, Regional Commissioner for Schleswig-Holstein, Germany, relating to a proposal to establish a Patent Office for Germany, Oct 1947. Papers and maps relating to the history of the Frisian Islands, Germany, 1936-1969, including printed map of Langeness Island, 1936; typescriptnotes on Groede-Appellard Island [1947].

Papers of Captain Frank Edward Weatherstone Lammert on service in Royal Naval Volunteer Reserve (RNVR) in Far East and Mediterranean, 1943-1964, including photocopies from The National Archives (formerly Public Record Office) (Ref PRO ADM 199) of Lammert's reports on his command of Netherlands East Indies motor patrol vessel P-10 and the events of his escape from Singapore to Australia, Feb-Mar 1942; magazine, The Sun Life War Front , 20 Mar 1943, including Lammert's account of his escape (see also PRO copy); certificates of mentions in dispatches, Jan 1944 and Feb 1945; three copies of The Navolteer , magazine of the Singapore Division, Malayan Royal Naval Volunteer Reserve Vol. 1 Numbers 2-4, Dec 1956, June 1957 and Dec 1959; Vietnamese and Singaporean press cuttings relating to goodwill visit by HMS PANGLIMA, under Lammert's command, to the Vietnamese Navy at Saigon, Apr 1957; order of ceremony for unveiling of war memorial to Malayan RNVR, Singapore, Jul 1957; letters of congratulation, 1957-1958, on relinquishing post as Officer Commanding Singapore Division, Malayan RNVR, and on award of CBE; programme for ceremonial transfer of Malayan RNVR to the Federation of Malay, Sep 1963; correspondence re Lammert's transfer to RNR retired list, 1964, and 1994-1995; exchange of letters, 7 and 14 Feb 1989, concerning Lammert's war service , 1939-1945, and other Malayan RNVR personnel; copy correspondence, Nov 1994, re the placing of an annual in memoriam notice in the _Times and Telegraph _, for members of the Malayan RNVR who died serving in HMS LABURNUM; correspondence with Audrey Holmes McCormick, 1994 and 1996, re her research for proposed book on volunteer forces in the Far East, 1930s - 1940s including detailed 15pp letter from Lammert relating to his naval service and to his early life in Hong Kong and China (including a meeting, aged 4, with the Chinese Emperor); photocopy map of Malaysia and Sumatra, [1964]; photographs (uncaptioned), chiefly of Malayan RNVR official events. Also letter and notes to Lammert from his brother, Robert T Oswald Lammert (1902-1981), Jun 1979, describing his experiences as a Prisoner of War, in Changi POW Camp, Singapore, 1942-1945, with photocopies of drawings by Ronald Searle, done in Changi camp, and a Union Flag picked up by Robert Lammert on the march from central Singapore to Changi camp, 1942, which he occasionally surreptitiously hoisted in camp.

Anti-British propaganda leaflet, in Arabic, Hindi, and Urdu; anti-British propaganda leaflet calling for the Indian Independence League in East Asia to assist the Japanese in ridding Asia of all British influences; anti-French propaganda leaflet distributed in Indo- China announcing the fall of Singapore to the Japanese, 1942

Papers relating to Gibbs' early career, 1917-1927, including typescript copies [1972] of combat reports written by Gibbs, 17 Sqn, Macedonia, 1917-1918; typescript notes by Gibbs entitled 'Service experiences', 1926; typescript Staff College essay entitled 'Leadership and morale', 1927. Nine typescript texts of lectures by Gibbs, 1948-1972, on the RAF in World War Two, post war airpower, India and the Indian Air Force and the North Atlantic Treaty Organisation (NATO), also 'Air power in modern war', by MRAF Arthur William Tedder, 1st Baron Tedder of Glenguin, 1947. Papers relating to Gibbs' career in the RAF, 1945-1954, including correspondence and typescript notes by Gp Capt I C Bird on the war efforts of India, South Africa and the Colonies [1948]; letter andgraph by Wg Cdr J D Warne, dated 1949, on numbers of sorties flown and losses suffered by the Luftwaffe and the RAF during the Battle of Britain, 1940; typescript copies of correspondence between Gibbs and Adm Louis Francis Albert Victor Nicholas Mountbatten, 1st Earl Mountbatten of Burma, Commander-in-Chief, Mediterranean, 1953; typescript report by Gibbs entitled 'Report on the progressand the policy problems of the Indian Air Force', 1954. Papers and correspondence, 1955-1984, including typescript article by Gibbs entitled 'The lessons of Skybolt, Britain's new defence plans', with letter from Sir Hugh (Nicholas) Linstead MP, 1963; typescript memorandum by MRAF Sir John Cotesworth Slessor entitled 'Integration of the Services within the new defence organisation', 1964;correspondence with Dr G Vincent Orange, History Department, University of Canterbury, Christchurch, New Zealand, dated 1982, concerning research for A biography of Air Chief Marshal Sir Keith Park GCB, KBE, MC, DFC, DCL (Methuen, London, 1984), with copy of letter from ACM Sir Keith Rodney Park, Air Commander-in-Chief, South East Asia to MRAF Sir Charles Frederick Algernon Portal, Chief of the Air Staff, relating to the possible replacement of Gibbs as Chief Air Staff Officer, Supreme Headquarters South East Asia Command [1945]. Copies of Gibbs' letters to the press, 1955-1982, relating chiefly to defence issues, service pensions, capital punishment, immigration and Rhodesia. Publications and articles, 1928-1961, including copy of Air Ministry Air Publication 1308 entitled 'A selection of lectures and essays from the work of officers attending the fifth course at the Royal Air Force Staff College, 1926-1927', (HMSO, London, 1928), including article by Gibbs 'Lecture on fighter squadrons in air defence'; article by Gibbs 'Aircraft types and strategical mobility', Journal of the Royal Air Force College, 1930; booklet by Gen Sir Archibald Percival Wavell entitled 'Generals and Generalship' (reprinted from The Times, London, 1941); three editions of Impact magazine, subtitled 'US Tactical air power in Europe', May 1945, 'Strategic air victory in Europe', Jul 1945, and 'Air victory over Japan', Sep-Oct 1945; restricted pamphlet by MRAF Hugh Montague Trenchard, 1st Viscount Trenchard of Wolfeton, entitled 'Air power', 1946; restricted pamphlet by US Gen Carl A Spaatz entitled 'American views on air power', 1947; article by ACM Sir Keith Rodney Park entitled 'Background to the Blitz, from Hawker Siddeley Review, Dec 1951; article by Gibbs 'The development of defence in NATO's second decade', The British Survey, Feb 1959; article entitled 'Maintaining the deterrent in the future', by Gibbs, The Aeroplane, Mar 1961.

Report by Gavin on 101 Special Training School, 1942, including details of its formation, organisation, training and operations in the Far East, May 1941-Mar 1942. The School aimed to train all types of personnel, whether military, civilian, European or native, in irregular warfare.