It was a very desperate and difficult business, which lasted for ten days, during which each division showed the most splendid courage and endurance, as can be proved by the fact that their united losses came to 8000 men out of about 16,000 engaged, and that they met and defeated four German divisions, capturing 1500 prisoners, 140 machine-guns, and 40 cannon. The opening attack, during which the advancing lines passed through the ranks of the Second Italian Corps, was greatly stimulated by the news of the splendid Allied advance of the two previous days, July 18 and 19.

The fighting of both divisions was made very difficult by the underwood and the standing corn which lay before them, thickly sown with German machine-guns. On July 20 the 2/4th York and Lancasters, on the extreme right of the British line, captured Bouilly, but were driven out again. At the same time the 5th Yorkshire Light Infantry was held up and lost heavily in front of the Château of Commetreuil. It was a long, difficult, and expensive day for the 187th Brigade, and its only remaining battalion, the 2/4th Yorkshire Light Infantry, lost heavily as well.

The 185th Brigade on July 20 occupied the left of the divisional line, with the Highlanders on the other side of the Ardres. Marfaux and Cuitron lay before them, but neither could be quite reached, though again and again the assailants were on the very edge of the villages. Once some of the men of the 2/4th Hampshires from the supporting brigade actually penetrated the village, but they were seen no more. The 2/4th West Ridings, south of the village, were also held up. Meanwhile the 5th West Ridings attempted to work around Marfaux from the north, through the wood of Petit Camp. All attempts to debouch from the wood were vain, however, and again the attack was brought to nought. Some ground had been gained during the day, but both main efforts had failed, and all three brigades of the Sixty-second Division had been badly mauled. With no British reserves behind, General Braithwaite must have been sorely exercised in his mind that night.

On July 21 the attack eased down on the left, but on the right the 187th Brigade deployed and attacked the Bouilly Ridge. The 9th Durham Pioneers made a very fine advance, as did the 2/4th York and Lancasters, and some valuable ground was taken, but none of the villages. The attackers were encouraged, however, by learning from prisoners that the Germans had endured heavy losses, and had been compelled to demand reinforcements.

On July 22 the situation began to clear a little as Burnett's 106th Brigade, represented mainly by the 5th West Ridings, attacked the wood of Petit Camp, an ominous grove, already littered with British dead. So deliberate was their advance, in consequence of the difficult ground to be searched, that the barrage was at the rate of 100 yards in ten minutes. The place was one long succession of gun posts "en echelon," which were so concealed that they had no field of fire, and were the more deadly on that account as they fired by sound out of the bushes, and could not possibly be seen until one walked up to them. None the less the Yorkshiremen, helped by a wing of the 5th Devons, fought their way through this dreadful wood, dropping small posts as they went. Two hundred prisoners and 41 machine-guns remained in their hands, with 700 yards of new ground. The German losses were heavy, but so were the British, Captain Cockhill's company of the West Ridings emerging with two officers and six men able to report for duty. It was a fine operation, well conceived and well carried through. The Germans fought with great tenacity all day.

On July 23 the south-western corner of the Petit Camp Wood, which was still in German hands, was cleared by the 6th West Ridings. The main attack, however, on Marfaux and Cuitron was carried out by the Durhams and the New Zealand Cyclist Battalion with magnificent success. Marfaux fell to the New Zealanders. The stormers broke through both villages and made their line 400 yards beyond. Two French tanks did good service in this assault. Two hundred prisoners and eight French 75's, taken previously by the Germans, were among the trophies of this fine advance. The Seventy-seventh French Division had attacked upon the right with equal success.

Up to this period the Highlanders of the Fifty-first Division had been striving hard on the southern side of the Ardres, with a task which was not less difficult than that of their English comrades on the north.

On July 20 they found the enemy opposite to them in great strength, as was shown by the fact that prisoners from three divisions, the Twenty-second (Saxe-Meiningen), the Hundred and third (Hessian), and the Hundred and twenty-third (Saxon) were taken that day. The great straggling wood of Courton, with a fringe of farms, mills, and other buildings, formed a strong advanced position. The Fifty-first Division has gained so splendid a record in the war that advantage may be taken of this action to give in fuller detail its glorious units. The attack that morning was carried out by the 154th Brigade, consisting of the 4th Seaforths, 4th Gordons, and 7th Argyll and Sutherlands, on the right flank. On the left was the 153rd Brigade, consisting of the 6th and 7th Black Watch and 7th Gordons. In reserve was the 152nd Brigade, 5th and 6th Seaforths and 6th Gordons, with the 8th Royal Scots as pioneer battalion. The attack was supported by French artillery and also by the guns of the 255th and 256th Brigades R.F.A.

The advance was a most arduous one, especially after the first victorious rush when the troops found themselves involved in the thick brushwood which prevented co-operation to such an extent that the two brigades were entirely separated, but each struggled on independently, small knots of determined men fighting their way forward as best they might. The progress was better upon the left than on the right, but the casualties were heavy, for the German machine-guns had survived the barrage and were very deadly. Colonel Bickmore of the 4th Gordons led a company of his battalion against a German post but was brought down by a bomb, and his men driven back. When the ground was recovered the Colonel had been carried off as a prisoner. The German infantry seem to have taken hardly any part in the battle, which was fought between the splendid Scottish infantry on one side, and the determined German machine-gunners on the other. The Black Watch of the 153rd Brigade found an even blacker watch fighting on their flank, for the Senegalese infantry of the French Ninth Division went forward with them and did good work during the whole arduous day. So sweeping was the machine-gun fire that at many points it was found to be impossible even to creep forward through the two-foot corn.

By evening the attack had been definitely held, and the Highlanders were forced to be content with their initial gains, while the French on the left, who had been assaulting the hamlet of Paradis all day, were also stationary. At 6.30 a company of German infantry attacked the Argylls, but were driven back with heavy loss. So the long day ended, the troops being much exhausted. The capture of 8 officers and 360 men, with many machine-guns, was an inadequate return for such heroic exertions. All day the enemy had been withdrawing upon the Marne front, and the holding of his flanks was so vitally essential that he was prepared to make any sacrifice for the purpose.