The second phase placed the right of the 30th Division on the south of the Cojeul River and in possession of St. Martin-sur-Cojeul, and the left through the Hindenburg (Cojeul Switch) Line, while the 56th and 14th would be in front of Wancourt.
The 56th and 14th Divisions were not to go beyond Nepal Trench, as the 30th Division, pushing up from the south-west, would cross their front and, passing entirely to the south bank of the Cojeul, would join hands with the troops of the VI Corps east of Guemappe. The 21st Division would contribute to the flank thus formed with its right standing fast on Croisilles.
After this Green Line, as it was called, there was the usual hopeful reference to a distant objective, Cambrai, and some talk of cavalry, no doubt a necessary
provision, but one which, nevertheless, was greeted with hilarity. One thing, however, seems very certain: the German retreat caused very little inconvenience to the Third Army, and none at all to the First.
Preparations for the attack on the Third Army front were carried on swiftly. The enemy made no further move, but to the south, where he had many miles to go before reaching the Hindenburg Line, he was still being closely pursued by the Fifth Army. By the 2nd April the general line was Sélency, Jeancourt, Epéhy, Royaulcourt, Doignies, Mercatel, Beaurains. Between Sélency and Doignies the enemy still held positions in advance of the Hindenburg Line, and minor engagements were continually taking place on this section of the front.
On the night of the 1st April the 167th and 168th Brigades relieved the 169th Brigade in the front line. The bombardment of the enemy positions commenced on the 4th, and was carried on for five days. Meanwhile troops could study the country they were to attack.
While the 169th Brigade had been in the line, training had been carried on extensively by the other two brigades. Some of the instructions and arrangements are worthy of note. For the men, open fighting was the main practice. Regimental officers were told that
“it must be realised that the maintenance of forward movement depends on the determination and power of direction of sections, platoons, companies, and battalions. The habit of digging a trench and getting into it, or of waiting for scientifically-arranged artillery barrages before advancing, must be discarded.
A slow advance will give time for the German reinforcements to arrive—the greater the rapidity of an advance the more is resistance likely to lessen. A few sticky company commanders may not only delay the whole operation but, by giving the enemy time to reinforce, will also cause unnecessary casualties.”
We quote this for comparison with other instructions given at a later date. There is nothing new in it, and nothing to criticise in it, but man is a lover of precedent, and trench warfare, and failure to get through to open fighting, was the precedent established for him.