On the same day I put into effect a project of organization which the necessities of the case forced upon me. North of the river stood the 13th Australian Brigade, and the 131st American Regiment, both still under the command of General Maclagan, the remainder of whose Division was resting, and this Division might be required at short notice for operations at a totally different part of the front. (I had, in fact, earmarked it for the proposed attack on August 15th to which I have referred.)
To overcome this anomalous position, I decided to constitute, for a brief period, an independent force, composed of the two units north of the river which I have named, to appoint to the command of it Brigadier-General Wisdom (of the 7th Brigade), and to supply him with a nucleus Staff, some Artillery, and supply and signal services. It became, in fact, to all intents and purposes, an additional Division with a Headquarters directly responsible to me.
This force received the name of "Liaison Force" and continued in existence for about eight days. Its functions were to keep tactical touch and liaison with the Third Corps, to protect my left flank by guarding the Etinehem spur from recapture, and to act as a kind of loose link between the two Corps, advancing its northern or its southern flanks, or both, in sympathy with any forward movement to be made by either Corps. While, during its existence as a separate force, no operations of first magnitude took place, yet the Liaison Force served me well in the very useful function of a custodian of my tactical ownership of the Somme valley, an ownership which I succeeded in retaining to the immense advantage of the operations of the Corps less than three weeks later.
By August 13th, therefore, my responsibilities included the control of seven separate Divisions as well as all the Corps Troops, and Army Troops attached. The next week was occupied in local operations by the front line Divisions to straighten our front, and to dispose of a number of strong points, small woods, and village ruins which, so long as they were in enemy hands, were a source of annoyance to us. The attitude of the enemy was alert but not aggressive, and an important point was that he showed every desire to stand his ground, and to contest our further advance. There was as yet no indication of any comprehensive withdrawal out of the great river bend. Each day brought its useful toll of prisoners, all of whom, however, corroborated the view that the enemy meant to hold on, and that the troops opposing us were more than a mere rearguard intended to delay our advance.
The period from August 13th to 20th was also occupied in carrying out a number of inter-divisional reliefs—events of merely technical interest to the student of military history, but imposing an immense amount of detailed work upon the Staff of the Corps and upon the Commanders and Staffs of the Divisions concerned. It was my own special responsibility, and one which I could not delegate, to decide the date of the relief of each Division and by which other Division it should be relieved. Such decisions involved a close inquiry into, and a just and humane appreciation of the condition of the troops, almost from hour to hour every day, a duty in the discharge of which I was able to rely upon the loyal help of the Divisional Commanders and Brigadiers.
The time that had elapsed since last they had rested, the marching they had since done, the fighting they had undertaken and its nature, the mental and physical stress which they had undergone, and the probable nature and date of their future employment were all factors which had to be weighed carefully, and set against the advantages or disadvantages of cutting short the period of rest of the troops who were available to relieve them. It was a function which had to be exercised, at all times, with the greatest circumspection, and the strictest justice; for troops are very ready to acquire the impression that they are being called upon to do more than their fair share.
MAP C.
An actual inter-divisional relief usually occupied two nights and the intervening day. Incoming units, both fighting and technical, had to be shown all over the sector, to be taught the dispositions and the exact situation in front of us; maps, orders and photographs had to be explained and handed over; stores and dumps had to be inventoried and receipts passed; while on the other hand the outgoing troops expected to find their billets, offices, stables, wagon lines, bathing-places and entertainment rooms in the rear area all allocated and ready for their occupation.