The raiders were divided into squads of 1 N.C.O. and 8 men, each officer commanding a group of three or more squads. Each squad had a particular section of a particular trench given to it as its objective. Air photographs were carefully studied, and where dug-outs could be located. The squads detailed to deal with them carried either 20 lb. charges of ammonal or phosphorus bombs and tins containing one gallon of petrol. The ammonal was to be used to blow in the dug-out entrances, while the petrol was to be hurled down the stairs, followed by the phosphorus bomb, which caused the dug-out to catch fire. Unless some such measures were taken, in a raid in which the troops could only remain in occupation of the German trenches for a limited time, the Boches could remain secure in their dug-outs until the raiders had departed. The ordinary Mills bomb had little effect in a dug-out containing several chambers, while the men would have little chance of succeeding had they attempted to enter an unknown dug-out and deal with the enemy below ground. The raid was a complete success, every squad with the exception of four reaching its objective. One officer and 20 other ranks of the 2nd Bavarian Reserve Infantry Regiment were captured, and 66 dead were counted in the enemy trenches apart from those who succumbed in the dug-outs. The total casualties to the 6th Gordon Highlanders were 6 officers and 48 other ranks, of whom many were only lightly wounded. Eight Stokes bombs, 660 lb. of ammonal, 16 tins of petrol, and 164 phosphorus bombs were thrown down the dug-outs. Many entrances were destroyed, while several were observed to be still burning twelve hours after the raid. The wire was found to be badly damaged, and the trenches much destroyed from the bombardment. The raid impressed on all ranks that the Bavarian is a magnificent fighter. Lieut.-Colonel J. Dawson, D.S.O., commanding the 6th Gordon Highlanders, who was responsible for the details of the raid, reported as follows: "A stout resistance was offered in every part of the area, men in the open trench resisting chiefly by bomb-throwing, while the firing of rifles and throwing of bombs took place from every occupied dug-out. Until this was discovered, several casualties were inflicted on men passing dug-out doors. The sound of the explosion of Mills bombs thrown down the stairways had not died away before rifle-firing and bomb-throwing up the staircase was resumed, and silence was not obtained until the mobile charges of ammonal were exploded. Isolated snipers hung on until knocked out, and one machine-gunner, who was ultimately killed and his gun destroyed, was firing from in front of the German second line before our men had withdrawn from that trench. In only one single instance, where five men came voluntarily from a dug-out, were surrenders made, and in most cases pockets held out until all were killed."