On 14 July 1916 at 03.25 twenty thousand men of the 3rd and 7th Divisions moved forward up Caterpillar Valley to attack Delville Wood, whilst the 21st Division advanced on and captured Bazentin-le-Petit Wood.

Flatiron Copse Cemetery at Mametz contains the graves of 1,520 soldiers from the United Kingdom, 30 from New Zealand, 17 from Australia, and one from South Africa.  There are 416 unnamed graves.  Special memorials are erected to 36 soldiers from the United Kingdom thought to be buried among them.

Serre Road No.2 Cemetery is a massive Commonwealth War Graves Commission cemetery south west of the village of Serre.

Serre Road No.1 Cemetery is a very large Commonwealth War Graves Commission cemetery situated on the No Man’s Land over which the Leeds and Bradford Pals attacked the village of Serre.

Queens Cemetery is the largest of the group of cemeteries near Sheffield Memorial Park.

Railway Hollow Cemetery is situated on the position of the British support line on 1 July 1916.  It is 1,300 yards west of Serre and 200 yards west of the plantation called Mark Copse.

Luke Copse Cemetery is situated on the position of the British front line on 1 July 1916.

The attack on Serre was a disaster.  There were 3,599 casualties, of which a large proportion had been killed.  The 31st Division and its Pals Battalions were decimated.