In the meantime, a considerable German attack had been prepared which fell upon the Australian line in the early morning of April 15. Two Guards Divisions and two ordinary divisions took part in it, so that it was no small matter. The outposts were weak and a number of the field-guns had been brought well forward into the front line, so that the first onset crashed through the defences and brought about a situation which might have been dangerous. The front line rallied, and with the aid of supports advanced so swiftly upon the Germans that they had little time to injure the guns which had come for the moment into their power. The front of the attack was nearly six miles, from Hermies to Noreuil, with its centre at Lagnicourt, and all along this extended position the stormers had rushed forward in heavy masses into the Australian line. It was easier to break than to destroy, for every scattered post spat out bullets from rifles and Lewis guns, fighting viciously until it was either submerged or rescued. In some posts, notably that of Subaltern Pope, an old warrant-officer of the Navy from West Australia, the men fired away every cartridge and then all died together, stabbing and thrusting with their bayonets into the grey clouds which hemmed them in. Seventy German dead were found round his position. In front of Lagnicourt, the Germans had the advanced guns in their hands for nearly two hours, but they had been dismantled by the gunners before they were abandoned, and the Prussian Guardsmen had apparently no means of either moving or of destroying them. All of them, save five, were absolutely intact when retaken. A rush of Queenslanders and New South Welshmen drove back the intruders, retrieved the guns, and followed the fugitives into Lagnicourt. Large numbers of the Germans were shot down in their retreat, especially in their efforts to get back through the gaps in their own wire. Both sides took several hundred prisoners in this action, but the German losses were heavy, and nothing at all was gained.
The units which have been mentioned, the Seventh, Fifty-eighth, and Sixty-second Divisions, with the Fourth and Fifth Australian Divisions, constituted for the moment the whole of Gough's Fifth Army. To its south, extending from the right of the Australians at Hermies down to the junction with the French at St. Quentin, lay Rawlinson's Fourth Army, which consisted at this period of the Fifteenth Corps (Du Cane) upon the left, with the Twentieth, Eighth, and Forty-eighth Divisions in the line. To the south of this was the Third Corps with the Fifty-ninth, Thirty-fifth, and Thirty-second Divisions in the line. Their general instructions were to push the enemy back so as to gain complete observation of the Hindenburg system. The Twentieth Division pushed up into Havrincourt Wood, and gradually by many skirmishes cleared it of the enemy, an operation which extended over some time, but was not accompanied by any hard fighting.
A sharp little action, already described, was fought at the extreme south of the British line upon April 13, in which the Thirty-second Division was engaged. This unit captured Fayet, which is only one mile north of St. Quentin. At the same time, the two divisions upon the left, the Thirty-fifth and the Fifty-ninth, advanced and captured the ground in front of them. After some fighting, these two divisions occupied the Gricourt-Pontruet line. This section of the line ceased after April to concern the British commanders, for the St. Quentin end of it was taken over by the French, while the trenches north of that were occupied by Canadian and Indian cavalry, so as to release fresh divisions for the operations in the north.
The full objects of the Arras battle, so far as they could be attained, had been reached after a week of fighting. Had he only himself to consult, Sir Douglas would have assumed a strict defensive from that time onwards and begun at once to transfer his forces for those operations which he had planned in Flanders. It was essential, however, that he should hold and use up as many German divisions as possible in order to help the French offensive which was about to start in the south. How successful the British General had been already in this design is shown by his own statement that after this week of fighting the Germans had twice as many divisions opposite to him as they had at the beginning, and were driven into constant counter-attacks which cost them heavy losses. The whole aftermath of the Battle of Arras, extending until the end of May, is to be judged from this point of view, and though we may be inclined to wince at the heavy losses and the limited results, we have to bear in mind continually the wider strategic meaning of the operations.
Chart of ORDER OF BATTLE—ARRAS April 9, 1917