Men of 7th Battalion, The Green Howards on an exercise among the sand dunes at Sandbanks, near Poole in Dorset, 31 July 1940.
Film still from the D-Day landings showing commandos aboard a landing craft on their approach to Sword Beach, 6 June 1944.
A Royal Navy officer using a sextant aboard a destroyer on convoy protection duties, 1942.
A raiding party of the 10th Battalion, Cameronians (Scottish Rifles) waiting for the signal to go. John Warwick Brooke, the official photographer, followed them in the sap, into which a shell fell short killing seven men. Near Arras, 24 March 1917.
Wounded men being tended in a trench near Beaumont Hamel on the morning of the initial assault, Battle of the Somme, 1st July 1916.
Wounded British soldier showing shrapnel damage to his steel helmet caused near Hamel on the Somme Front in December 1916.
Winston Churchill on board the battleship HMS PRINCE OF WALES during his journey to America to meet President Roosevelt, August 1941.
The Royal Air Force: The rear gunner in his position in a Wellington bomber.
Supermarine Spitfire Mark VCs of No. 2 Squadron SAAF based at Palata, Italy, flying in loose line astern formation over the Adriatic Sea while on a bombing mission to the Sangro River battlefront.
Squadron Leader Robert Stanford Tuck, commanding No. 257 Squadron, in the cockpit of his Hawker Hurricane at Martelsham Heath, November 1940.
Soldiers of 'A' Company, 11th Battalion, the Cheshire Regiment, occupy a captured German trench at Ovillers-la-Boisselle on the Somme.
Pilots of No. 303 (Polish) Squadron RAF with one of their Hawker Hurricanes, October 1940.
Officers and men of 26th Divisional Ammunition Train (Army Service Corps) playing football in Salonika, Christmas 1915.
Irish Guards wearing gasmasks advance through smoke with 'tommy guns' at the ready, at Nooks Head near Woking in Surrey, 8 July 1940.
HMS CONQUEROR, the Churchill class nuclear-powered fleet submarine, underway in the early 1970s. In 1982, the submarine sank the Argentine cruiser ARA BELGRANO during the Falklands War.