Bazentine Ridge, Delville Wood, Fromelles, Ancre Heights and the Ancre

The battle of Bazentine Ridge, 14 July-17 July 1916, was the start of the second phase of the battle of the Somme, designed to break into the German second line.
The battle of Delville Wood, 15 July-3 September 1916, began as part of the battle of Bazentine Ridge, itself part of the first battle of the Somme.
The battle of Fromelles, 19-20 July 1916, was a minor British attack launched close to Aubers Ridge in order to prevent the Germans moving troops from their quiet sectors to the battle of the Somme.
The battle of the Ancre Heights of 1 October-11 November 1916 was part of the wider first battle of the Somme. It was fought on the left of the British line of the Somme, with the aim of pinching out a German salient on the Ancre River created by the limited British advances further along the line.
The battle of the Ancre, 13-19 November 1916, was the final phase of the first battle of the Somme. It involved an attack on the German front line as it crossed the Ancre River, a sector of the front that had first been attacked on the first day of the battle without success.