The 71st Infantry Brigade attacked with the Foresters north of the railway and 9th Suffolk Regiment south of the railway, while the 8th Bedford Regiment, who were close to the Quadrilateral on the north-east of the Leuze Wood, co-operated by bombing up the trench towards it.

The artillery co-operation was weak, observation being difficult, and though the troops advanced with the greatest gallantry the northern attack could only make 500 yards, and the southern attack of the 71st Infantry Brigade still less, while casualties from the enemy artillery and machine-gun fire were very large.
A second attack at 6 p.m.the same day succeeded in bringing our line to about 250 yards from the Strong Point, and in getting touch on the right with the 16th Infantry Brigade.
Preparations were now made to include the Quadrilateral in the general attack of the 15th September instead of making it a subsidiary operation--a situation which recurred two years later almost to a day in the attack on Holnon Village, and which had similar results.
The British objective for the 15th September was Gueudecourt-Flers-Lesboeufs-Morval--the XIV Corps (Guards and 6th Division) to capture the two latter.

It was the first occasion on which tanks were employed, and as far as the Division was concerned was a failure, for of the three allotted to the 6th Division two broke down before starting, and the third, moving off in accordance with orders long before the infantry, had its periscope shot off, its peep-holes blinded, was riddled by armour-piercing bullets, and had to come back without achieving anything.

This again found a parallel in the attack on the Quadrilateral, near St.Quentin, on 18th September 1918, when the tanks were ineffective.
To facilitate the movement of the tanks a gap of about 200 yards had been left in the creeping barrage.

This gap unfortunately coincided with the strongest point of the Quadrilateral.