Allied troops crossing the Somme, France, during World War I. A line of soldiers crossing the Somme over the tangled remains of a partly-destroyed metal bridge. In the background an officer is directing their advance. It is possible that this photograph was taken during the successful Allied advance in the spring of 1917. Field Marshal Haig records the crossing of the Somme on 18 March 1918, 'By 10.0 p.m. on the same day Brie Bridge had been repaired by our engineers sufficiently for the passage of infantry in single file, and our troops crossed to the east bank of the river, in spite of some opposition.' [Original reads: 'In the track of the Hun. The first of our men to cross the Somme, near Peronne.'].