The collection covers Pyman's career from 1937 until 1963 when he suffered a severe stroke which forced his retirement in 1964. The earliest papers date from Pyman's work with the Royal Tank Cadre in converting the 17/21 Lancers from a cavalry to an armoured regiment. There are also papers from Pyman's period as an instructor at the Staff College in Quetta, India, 1939-1941. Pyman was involved in the World War Two campaigns by the 8 Army in the Western Desert, in 1941 as General Staff Officer with 7 Armoured Div, 30 Corps and in 1942-1943 as Commander of the 3 Royal Tank Regiment, 10 Armoured Div, 30 Corps. The papers consist mostly of Pyman's assessments of lessons learned from the ongoing campaigns particularly with regard to tanks and armoured units. In 1944-1945 Pyman was Brigidier General Staff, 30 Corps, 2 Army in the Normandy landings and the invasion of Northern Europe, with particular responsibility for organisation and planning of the Rhine crossing and advance to the Baltic. This is reflected in the papers which largely consist of planning studies and reports for the operations involved, this section also contains maps used in the campaign. Pyman's next appointment was as Chief of General Staff, Allied Land Forces, South East Asia, 1945-1946 which is documented by a series of diaries which reflect the tasks faced by Pyman in this command including dealing with the build up of tension between newly liberated former colonies keen to assert their right for independence and the former colonial powers such as France and Netherlands. Pyman spent 1946-1949 as Chief of Staff, Middle East Land Forces and kept monthly diaries which form the bulk of this section of the collection. The diary entries and additional papers reflect the debate over policy in the Middle East in the British Government and Military command, they include detail on the British withdrawal from Greece, the problem of illegal Jewish immigrants and their internment in Cyprus, the end of the British mandate in Palestine and the the effect of this on relations between Britain with Egypt and the other Arab states and the subsequent Arab Israeli conflict. This section of the collection also contains correspondence between Pyman and Maj Gen Sir Miles Christopher Dempsey on personal matters and on the Middle East. There are also papers from Pyman's work at the Ministry of Supply as Director General of Fighting Vehicles, 1951-1953, Director of Weapons Development, War Office, 1955-1956 mostly brief diary entries and lecture texts. Pyman was also General Officer Commanding, British Army on the Rhine, 1953-1955 and General Officer Commanding, 1 British Corps, 1956-1958 and the papers relating to these commands consist mostly of lectures, reports and directives reflecting his interest in armoured divisions and training. There are some papers, mostly personal correspondence and press cuttings, from Pyman's final command as Commander-in-Chief Allied Forces Northern Europe in North Atlantic Treaty Organisation (NATO). The collection also contains correspondence relating to Pyman's role as Colonel Commandant of the Royal Tank Regiment and The Royal Armoured Corps and a series of letters covering the reorganisation of the Berks and Westminster Dragoons, of which he was Honorary Colonel. The rest of the collection consists of diaries, correspondence, speeches, writings including the draft copy and papers relating to his autobiography, some preparatory work on a history of the 2 Army and reference works. The collection also includes the Boer War diaries and other papers of Col James Redmond Patrick Gordon who commanded the 1 Cavalry Bde of the South African Field Force 1900-1901 which were given to Pyman by a friend.

Papers of General Sir Ouvry Lindfield Roberts, 1898-1986, including diaries, 1913-1985; memoirs, including drafts; personal and official photographs; personal and official correspondence; press cuttings; issues of the Royal Engineers' journal, 1976-1986 and papers relating to Iffley Church, Royal events, Roberts' time in Canada, ceremonies, dinners and memorials.

Copy of memoirs of Lt Col John Burden Sanderson, including description of deployment with Territorial Army, 1938-1940; and brief recollections of service in India and Burma, 1941-1946, including liberation of POWs from Japanese internment camps, transcribed by Sanderson's son. Also transcript of interview with John Sanderson's father Maj Alexander Sanderson, 3 Australian Tunnelling Company, recorded 14 Apr 1967, relating to his life and career as an engineer working in Australia, 1896-1914; brief description of the work of Maj Alexander Sanderson and the 3 Australian Tunnelling Company, France, during World War One; and designs by Alexander Sanderson for a vertical take off plane, 1942.

Minutes of Meetings of the National Security Council, with Special Advisory Reports are microfilmed copies of meeting minutes and Special Advisory Reports undertaken by the US National Security Council, 1947-1960. Material in the collection relates to US strategic nuclear forces capabilities, 1947-60; US policy with respect to Japan, the Soviet Union, China, 1948-49; military assistance to non-communist nations, 1948-49; US policy on atomic warfare, 1948; the Berlin Blockade; the United Nations decision to introduce military forces to Palestine, 1948; US policy towards Soviet satellite states in Eastern Europe, 1949; US courses of action with respect to the Republic of Korea, 1950-1953; responsibilities of the Central Intelligence Agency with respect to guerrilla warfare, 1952; US policy and courses of action to counter possible Soviet or satellite action against Berlin, 1952; US objectives and actions to exploit the unrest in the Soviet satellite states, 1953; US courses of action with respect to Latin America, Iran and South Asia, 1953-85; covert operations, 1954-75; nuclear attack warning channel and procedures for civilians, 1955-65; the political implications of Afro-Asian military take-overs, 1959; and US policy towards Cuba, 1959-60. Special Advisory Reports concern Europe, the Soviet Union and its satellites, Latin America, Japan, The Middle East, the People's Republic of China, South East Asia, Angola, North Africa, 1947-1960.

Papers of ACM Sir Neil Wheeler including training account, report, press cuttings and photographs, 1939-1991, notably a comprehensive report on the Royal Air Force Operations in Malaya, June 1948-March 1949, produced by Air Headquarters, Royal Air Force Malaya, May 1949; text for talk by Wheeler on early aerial photographic reconnaissance, delivered at a Royal Air Force Historical Society seminar, 1991; undated detailed account of training for, planning and leading wing strikes against shipping convoys, 1942-1943. Cutting of article 'Cameramen of the Air: Photographing bomb damage - vital work of RAF PRU'S (Photographic Reconnaissance Units)', from The Times, 1 Sept 1943. Printed maps of Norwegian, English, French and German coastlines, [1942], with handwritten annotations. Album of Photographic Reconnaissance Unit photographs, 1940-1941, many with captions, showing locations in France, the Netherlands, Germany and Norway including: Brest harbour; anti-aircraft fire over Cherbourg; Morlaix; Brest; Chateau Bougon Aerodrome, Nantes; Nantes; St Nazaire; La Rochelle; La Pallice; Rochefort; Bordeaux; Dunkirk, showing wrecks on beaches; Le Havre; Zeebrugge; Boulogne; railway yards near Calais; Vlissingen Aerodrome; Antwerp; Ter Neuzen; Flushing; St Inglevert Aerodrome; Knickerbein W/T beam stations; Amsterdam; Ijmuiden; Gravelines; the Nordzee Canal; Caen; Schipol aerodrome; Stavanger; Bergen; Egersund Port; convoys in the Skaggerak area; Herl-Herdla Aerodrome; Lista aerodrome; Kiel; Bremerhaven; Brunsbuttel; Wilhelmshaven; The Hague; Dieppe; Rotterdam; Poix Aerodrome; Ostend; also photograph of shelling damage in Guernica, Spain, 2 Jun 1941; photograph of office showing maps and operations board for 8 Apr 1941; printed map with drawn annotations showing the ranges in nautical miles of medium range, long range, super long range and extra super long range Spitfires from Wick, St Eval and Heston. Loose photographs, 1939-1943, many with captions, showing: aircraft including a Maryland, a Swordfish, a Hawker Fury and a Heyford; Wheeler and colleagues at airfields in Wick, Scotland and St Eual, Cornwall, 1941; Wheeler and aircrew of 236 Squadron, 1943. Also painting of the insignia of 236 Squadron.

Copies of extracts from 'One man's war', a memoir of his service with the Royal Armoured Corps and the Royal Army Ordnance Corps, 1942-1946, written in 1981-1983. The extracts relate mainly to the practice of religion in the UK, India and Burma, 1942-1946, particularly the role of Christianity in army life.