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It was on the 28th of March, 1916, that volunteers were called for to raid the enemy's trenches, and out of the hundred who answered, a party of 45 was selected, under Lieut. A.J. Begg, and Lieut. J.N. Carpenter. This party went down to Dernancourt, behind Albert, to complete the training for the raid, and the intention was to rush the enemy on the night of 2nd April. That night, however, as already explained, proved unfavourable on account of a bright moon, and the party, after crawling stealthily towards the enemy's wire were observed near his trenches and were forced to withdraw. Training was resumed at Bouzincourt, and it was decided then to have the assistance of a preliminary artillery bombardment. A point in the enemy's salient south-west of Thiepval was selected, the wire there was cut in advance by the artillery, and close observation was maintained on the spot from day to day. Meanwhile the enemy's fortifications were duplicated on the ground behind Bouzincourt, and there, night after night, the raiding party practised the assault. The most careful preparations were entailed, with much planning and understanding of detail. Every man had to know thoroughly his part. There had to be no hitch anywhere. Lieut. Begg saw to it that the training was complete, and given any luck, success was fully assured.

On the night of the 22nd of April, the party, with blackened hands and faces, and equipped with an assortment of weapons worthy of Mexican outlaws, presented themselves at the head of Thiepval Avenue, and filed up to the "starting point" to await the report of the Patrol under Lieut. MacRobert, who also had charge of the tape-laying party which included Corporal Chapman. At 9.30 p.m. our artillery suddenly opened on the enemy's salient, and poured down on it such a tornado of steel as the Germans had never experienced before. For twenty minutes our shells flayed the German front line, and under this arch of shrieking explosives the battle party crawled right up to the rim of the bombardment. What wire remained uncut was blown to fragments by a torpedo, and when the barrage lifted and came down behind, the raiders jumped into the enemy's trench and set to work. For twenty minutes they bombed and destroyed, cleared dug-outs, pulled down machine guns, barricaded communication trenches, and handed prisoners back to escorts. Then on a signal they as quickly withdrew, and still under cover of artillery fire made their own trench again. Thirteen affrighted Germans, of two different units, accompanied the party; and, finest of all, every man of the party returned. Eleven of them were wounded, but only one seriously. Among those slightly wounded was Lieut. Begg, who was the spirit of the assault.

As a result of this success many congratulatory messages were received and several decorations awarded. Among the list of telegrams were the following:—

From the G.O.C. 10th Corps:—"Corps Commander congratulates the 17th H.L.I. on their successful enterprise, which reflects great credit on all concerned."

From the G.O.C. 32nd Division:—"I congratulate you. I was confident that the 17th H.L.I. would do the trick. Convey this message to them."

From Sir Henry Rawlinson, G.O.C. 4th Army:—"Please convey to 32nd Division, and particularly to the 97th Brigade and 17th Battalion Highland Light Infantry, my heartiest congratulations on their successful raid last night. The preparations were well and carefully thought out, the Artillery support was good, and the whole conduct of the operations reflects credit on all concerned."

From the G.O.C. 97th Infantry Brigade:—"Commander-in-Chief has awarded the following decorations:—Lieut. Begg, and 2nd Lieut Carpenter, Military Cross; 15507 Sergt.-Major Reith, D.C.M.; 15458 Sergeant Taylor, 2797 Private Leiper and 15720 Private M'Intosh, Military Medal. All 17th H.L.I. Major-General Rycroft offers his heartiest congratulations to above officers, N.C.O.s and men on their decorations. Letter with authority following."

The Battalion had three men killed and four wounded during enemy retaliation, but any serious effort by the enemy was checked, and on the 24th the unit went into reserve billets at Bouzincourt.