Battle of the Somme

Poppy field, village of Pas, Somme 1918

Firing shell during the Battle of the Somme

Calling gunners into action on the Western Front

Artillery on the march on the Western Front

Grave of Donald Forrester Brown VC

Bombarding the German lines, April 1918

Co-ordinated attack during Battle of the Somme

Aerial photo of Somme trench systems

English munitions factory during First World War

Dead troops by barbed wire, Battle of the Somme

Shellfire on the Western Front

Troops in trench during the Battle of the Somme

The ruins of Verdun, 1916

First use of tanks on the Western Front

Aerial image of Battle of the Somme

Map showing daily gains during Battle of the Somme

A trench, as depicted in a British training manual

Death and squalor - the Battle of the Somme

Somme bell at the Carillon

Sergeant Donald Forrester Brown (VC)

The ruins of Becordel, 1916

In the trenches on the Western Front

Alex McColl's letter

Soldier's identity disc returned after 92 years

Caesar, the Anzac dog

First World War casualties by month

Decorations and medals of Lieutenant-General Alexander Godley

Officer's riding boots

Alfred Booker

The Western Front 1916-1917 map

Somme battles 1916 map

Film: fighting at the Somme and Messines

Sound: veteran describes trench warfare

Sound: nearly getting killed at Battle of the Somme

Sound: sunken roads and the Battle of the Somme

The creeping barrage