Several systems of support trenches ran from north to south down the sector, the most important one, Stoke Support, running parallel to the front line, and commanding it from an average distance of 400 yards.
The two main communication trenches were Camel Avenue in the north and Cam Avenue in the south.
Battalion Headquarters were situated in Cam Valley, a small depression about 400 yards long and 80 yards in width on the north side of the Arras road, north-east of Athies.
Athies, in the hands of support troops, was the ration dump for the sector, and also maintained communication over the river with Feuchy.
A battalion in reserve manned the Arras—Lens railway embankment between the Scarpe and the Arras road, finding ample and comfortable accommodation in the numerous "bivvies" and dug-outs covering its western slope.
From the top of the embankment a fire trench had an excellent command of the approach from Athies.
Between the embankment and St. Laurent Blangy, two kilometres farther west, intervened the woods, lakes, and grounds of Blangy Park, giving cover to our field batteries.
Brigade Headquarters was on the main road St. Laurent—Blangy; while Quartermaster's Stores and Transport were at Ste. Catherine, north of Arras.
Relieving troops, rations, and supplies were brought up to the sector by means of a light narrow-gauge trench railway, which, leaving the dump and railhead at Anzin St. Aubin, three kilometres north-west of Arras, struck the Scarpe at St. Nicolas, and, travelling along its north bank under the cover afforded by the trees with which it was lined, came to an end just short of Feuchy.