The removal of the Twentieth Division at so critical a time could only be justified by the extreme and pressing need of the Nineteenth Corps, for it had the effect of producing an almost impossible position for the line in the south. Had it been possible to replace it at once with a solid French division, it would have mattered less, but as matters stood the One hundred and thirty-third French Division had itself been involved in the retreat and was greatly worn. There was so little time also to get it into its new positions that there was never any solid bastion upon that corner of the line. The result was speedily seen in the morning of March 28, when the Thirtieth Division were first subjected to a very heavy bombardment, and then looking south saw a general retreat going on from Arvillers, while their left flank at Warvillers was also very weak, since the Twenty-fourth Division was hardly strong enough to maintain itself. By 2 P.M. both flanks were bare, and the enemy were well round them in the north and in the south at Hangest. At one time it seemed impossible for the division to get clear, and even now their extrication seems miraculous to the officers who effected it. A rapid retreat was made through Mezières and on to Moreuil, which only just avoided the closing pincers of the German advance. The French, who were in the act of relieving the Thirtieth Division, came away with them and had the same narrow escape. The block upon the road which formed the only egress is described as having been appalling, fugitives, refugees, and small disciplined columns of troops being crowded together from one end of it to the other. "The men were excellent," says an officer of the Thirtieth Division. "Their discipline was not a bit shaken." Such words could not truthfully be said of every unit, and yet soldiers can have seldom been more highly tried in any operation in history. Even the Imperial Guard may reach its breaking point, as the retreat from Moscow has shown. At Moreuil there is only one bridge, and had the German artillery been able to find it the result would have been a Beresina. As it was, the troops got across and speedily reformed upon the farther side of the river Avre.
This may be taken as the limit of the retreat of the Eighteenth Corps, since the stand in the north of the line and the thickening French resistance in the south brought the momentum of the German advance to a halt. How terrible the ordeal had been may be gathered from the fact that the Twentieth Division, as already mentioned, was not more than 1000 strong, the Thirtieth Division about 2000 strong, the Sixty-first Division 2100 strong, and the Thirty-sixth Division only a little stronger at the end of it. Again and again it had been on the brink of absolute disaster, but always by the wise dispositions of General Maxse and his divisional generals, seconded by the splendid tenacity of his men, the worst consequences had been avoided. Rapid readjustments had been needed, but a fatal break was always averted. The troops were handicapped in every possible way, for not only was their artillery far below strength, but for some reason the British Air Service during these days of stress was very weak in this southern area, while the German machines were very numerous and aggressive. The artillery officers were splendidly cool and efficient all through, and in the case of the 92nd Brigade Royal Field Artillery near Esmery-Hallon, it is said that the last gun was just 25 yards from the Germans when it limbered up. For two days the whole corps artillery was with the French, and did fine work with them, but to the great detriment of their own infantry. Some of the batteries remained for a long time with the French, and one French general has left it upon record that the failure of the Germans to capture Moreuil on April 4 was almost entirely due to the splendid shooting of the 306th Brigade Royal Field Artillery. After the first two days of the retreat no guns were abandoned by the Eighteenth Corps. The total losses of guns might be put at about 90 field pieces and 4.5 howitzers, with about 50 heavier pieces.
CHAPTER VII
THE SECOND BATTLE OF THE SOMME
The Retreat of the Third Corps
Movement across the Crozat Canal—Fight of the 173rd Brigade—Forcing of the Canal Line—Arrival of the French—Fight of Frières Wood—Splendid work of the Cavalry—Loss of Noyon—Final equilibrium—General retrospect of the Battle.
March 22.
We shall now complete this slight survey of a vast subject by following the fortunes of Butler's Third Corps upon the extreme right of the whole British Army. It has already been shown that the condition of this corps at the end of the first day of battle was most perilous, as its left flank in the region of Essigny, where the battle zone of the Fourteenth Division had been deeply pierced, was completely turned. The Eighteenth Division in the centre had, it is true, retained its ground, but the left brigade of the Fifty-eighth Division upon the right, the only brigade of that unit which was engaged, had also after a very desperate resistance lost their front positions at Quessy opposite to La Fère. Therefore orders had been given to draw off the troops during the night of March 21 across the Crozat Canal, and a covering line had been built up from the 54th Brigade, the Second Cavalry Division, and the 12th and 18th Entrenching Battalions in order to hold the German pursuit and to give the somewhat dishevelled troops time to re-organise their ranks. By 5 A.M. on March 22 they were over the canal and the bridges had been destroyed. The artillery had been got over first to cover the crossings, and the 54th Brigade, which had covered the rear of the Fourteenth Division, was lined up from Jussy to Mennessis. The Eighteenth Division (less the 54th Brigade) fell back in the line of Frières Wood, behind the canal. Many guns had been lost but the cavalry had thrown the 3rd and 5th Brigades of the R.H.A. into the firing-line to support the infantry, and two new batteries of the 96th R.F.A., only arrived the day before from England, came in at the nick of time.
It was of the first importance to destroy the bridges along the canal, but this was found to be no easy matter. They had all been mined and prepared for destruction some time before by the French, but either the lapse of time or faulty material had caused such deterioration that the charges failed to explode, and had to be renewed and discharged under circumstances of great difficulty and danger. It was carried out none the less with great tenacity by the British sappers, but several weak points remained, notably a canal lock which had been so injured that the bed of the canal was exposed for some distance. The railway bridges here, as elsewhere, were also a source of weakness.