When the German offensive opened on 21st March, 1918, the 58th Division was in the III. Corps, Fifth Army; the other divisions of that Corps on the 21st being the 14th on the left and the 18th in the centre. The 58th on the right was the flank unit of the British Armies. The Oise above La Fère, opposite the ground held by the left brigade of the 58th, flows from north to south and thereafter from east to west. One brigade, the 173rd, was on the west bank above the bend while the others held a line from the south bank to Barisis, four miles south of the river. The two latter brigades were not seriously involved on the 21st. Sir Arthur Conan Doyle gives a detailed account of the battle on the III. Corps front. At p. 111, vol. v. he states that the 173rd Brigade, “which filled the space between Travecy on the left, and the Oise upon the right, had the 2/1st Londons in the forward zone, the 2/4th Londons in the battle zone opposite La Fère and the 2/3rd Londons in the rear zone upon the Crozat Canal. The single battalion in front was attacked by the impossible odds of three German divisions but held out for a long time with great constancy.” The battalion was overwhelmed but fought to the end. The enemy stormed forward to the battle zone but were vigorously opposed by the 4th Battalion aided by some sappers and pioneers. This force held up the attack for a time but were pressed back. “By 5 a.m. on the 22nd all troops were across, and the bridges destroyed. The 2/4th Londons succeeded in removing all their stores and munitions, and their remarkable achievement in holding the high ground of La Fère against ten times their numbers for as many hours, during which they inflicted very heavy losses upon their assailants, and repulsed six separate attacks, was among the outstanding military feats of that difficult day.” The 18th Division made a wonderfully fine and successful stand, but a break-through occurred on the front of the 14th Division. Sir Douglas Haig in his despatch of 20th July, 1918, paragraph 10, gives the dispositions of the various Corps on the Fifth Army front and states that “Over ten miles of this front between Amigny Rouy and Alaincourt were protected by the marshes of the Oise river and canal, and were therefore held more lightly than the remainder of the line; but on the whole front of this Army the number of divisions in line only allowed of an average of one division to some 6750 yards of front.” On the III. Corps front the extent of ground held was about 30,000 yards by two divisions and a brigade of a third. Their line was certainly opposite the marsh area but, as pointed out in paragraph 15 of the despatch, “Assisted by the long spell of dry weather hostile infantry had crossed the river and canal north of La Fère, and, south of St. Quentin, had penetrated into the battle zone between Essigny and Benay.”