索姆河
The 23rd (Northumbrian) Division, which had not advanced with the rest of the BEF, was still employed in rear-echelon duties. It was spread across the French "departments" of Pas-de-Calais and Somme, and had now been assigned to guard airfields. Demonstrating the division's lack of mobility, when the 10th Battalion, DLI was assigned to guard airfields near Abbeville (south of the River Somme) it required all of the divisional transport and immobilised all other units to accomplish this move.