British horse lines at Suvla Bay during the Gallipoli Campaign in 1915.
Nancy, springbok mascot of the 4th South African Regiment, in Delville Wood, 17 February 1918.
Forward scouts of the 9th Hodson's Horse, an Indian cavalry regiment, pause to consult a map, near Vraignes, April 1917.
Experimental camouflage on the fuselage of a Sopwith camel, developed during the First World War to disguise the aircraft's direction of flight.
Gladys Wilburn, a motor boat driver with the Women's Royal Naval Service, in her boat, the 'BALMACAAN', with her spaniel dog, Southwick, Sussex, 1918.
Remains of a Mk I 'Male' Tank of 'D' Company on the old Somme battlefield, September 1917.
Roll call of the 1st Battalion, Lancashire Fusiliers on the afternoon of 1 July 1916, following their assault on Beaumont Hamel during the opening day of the Battle of the Somme.
Officers and S.E.5a Scouts of No. 1 Squadron, RAF at Clairmarais aerodrome near Ypres.
A 6-inch howitzer being manhauled through the mud near Pozieres during the Battle of the Somme in September 1916.
Two women munitions workers with a truck load of shell cases in the New Case Shop at the Royal Arsenal, Woolwich during the First World War.
Members of the Women's Land Army climbing over a gate on a British farm during the First World War.
Still from the British film "The Battle of the Somme". The image is part of a sequence introduced by a caption reading "British Tommies rescuing a comrade under shell fire".
Aerial photograph showing front line trenches and mine craters near Loos in 1917.
Munition workers painting shells at the National Shell Filling Factory No.6, Chilwell, Nottinghamshire in 1917.
A busy howitzer shop at Coventry Ordnance Works. Men and women work together as several gun barrels are transported overhead by pulleys.
Officers verses other ranks football match played by members of the 26th Divisional Ammunition Train near the city of Salonika, Christmas Day 1915.
A group of dog handlers stand with their dogs at the British Army kennels near Etaples, 20 April 1918.
A sister and a matron from Queen Alexandra's Imperial Military Nursing Service during the First World War.
A female munitions worker is lifted into the barrel of a 15-inch naval gun manufactured at the Ordnance Works, Coventry, during the First World War, in order to clean the rifling.
Sopwith F1 Camel, single-seat scout.
BE2c, two-seat reconnaissance aircraft, used by the Royal Flying Corps (RFC) during the First World War.
Still from the British documentary film 'The Battle of the Somme'. The image is part of a sequence purportedly showing British soldiers moving forward through wire at the start of the Battle of the Somme, 1 July 1916.
Ammunition limbers of 35th Field Battery, Royal Field Artillery, passing a corner of the shattered Delville Wood, Somme, 17th September 1916.
Carrying wounded across the battlefield under shell fire, Battle of Ginchy, Somme, 1916.