The night of February the 22nd, which saw the entry into line of the 30th Division, saw also a reorganization of the system of defence. All three Brigades now entered the line, the 108th on the right, 107th in the centre, and 109th on the left. Each had one battalion in the Forward Zone, one as garrison for the Battle Zone, and one in reserve. In each case the Forward Zone battalion had two companies in the line of resistance, finding their own outposts, one company for counter-attack in the front system, and one "passive resistance" company, with battalion headquarters, in a large fort in the Line of Redoubts. This unfortunate description implied that the last-named company was not allowed to counter-attack to retake ground lost in the front system. The Battle Zone battalions were billeted close to their battle stations, that of the 108th Brigade in dug-outs at Essigny Station, along the railway cutting, of the 107th Brigade in quarries near Grand Séraucourt, and of the 109th at Le Hamel, on the other side of the St. Quentin Canal. The artillery was disposed in two groups covering the Forward Zone, with one of the three Brigades, the 153rd, in reserve as supporting brigade. On February the 28th, when XVIII. Corps announced a "state of preparation," the batteries of this brigade took up positions south-east of Grand Séraucourt to cover the Battle Zone, with a section per battery pushed forward to temporary positions covering the Line of Redoubts. Upon these positions a vast amount of work had to be accomplished, an amount so vast that it permitted of very scanty time being allotted for training. The Battle Zone had practically to be created. The lines had been merely sited by the French, and a little wire put up. Work was concentrated first of all upon this; secondly, upon the fortresses which were to contain battalion headquarters and "the passive resistance" company in the Line of Redoubts--known, from right to left, as "Jeanne d'Arc," "Racecourse," and "Boadicea"; and lastly, upon making good the main communication trenches, and making wired-in platoon keeps in the Forward Zone. There was shortage of wire in February and the early part of March, and bad indeed would have been the state of the defences but for the large dumps left behind by the French, for which the countryside was scoured. As it was, no-one in the 36th Division can be said to have been satisfied with the state of the Battle Zone by mid-March. Most of the trenches were no more than eighteen inches deep, it having been ruled that there would be time to dig them out when it became necessary to occupy them.