The scheme, as set forth in this document, was for the infantry to break through the German defensive system with the aid of Tanks on a front from Gonnelieu to Hermies, seize the crossings of the Canal de l’Escaut at Masnières and Marcoing, cut the last of the enemy’s defences on the Beaurevoir-Masnières line, and pass the cavalry through the break thus made.
The cavalry were then to capture Cambrai and Bourlon Wood, cut all railway communications into Cambrai, and to occupy the crossings of the Sensée between Paillencourt and Palleul to the north of Cambrai. They would come up from Gouzeaucourt and Metz-en-Couture.
If this part of the plan was accomplished, the whole of the Third Army would participate in further operations to complete the surrounding of all the enemy forces in the Quéant salient. Presumably our Allies would have been called upon as well.
The III Corps, composed of the 20th, 6th, 12th, 29th Divisions, and 2nd and 3rd Brigades, Tank Corps (less three companies) would secure the canal crossings at Marcoing and Masnières, and form a flank from Gonnelieu through Bois Lateau, Creve-cœur, to a spot called la Belle Etoile a few miles south-east of Cambrai.
The IV Corps, composed of the 51st, 62nd, 36th, 56th Divisions, and 1st Brigade, Tank Corps, would attack with two divisions, on the left of the III Corps, and the right of the Canal du Nord, towards 172 Flesquières and Graincourt.
The success of the whole plan depended on the capture of Masnières and Marcoing, at which point the cavalry would be passed through the break, and, as speed was the essence of the operation, in order to obtain liberty of movement before the enemy could organise either counter-attack or a fresh line of defence by bringing up fresh troops, the leading cavalry divisions would have to pass through on the afternoon or evening of zero day.
Meanwhile, the IV Corps would be pushing forward on the left, with the first object of establishing a line from Noyelles, along the Canal de l’Escaut, through Fontaines, and relieve the cavalry on Bourlon, or fight for that position, and join with the original front line in the Louverval sector.
Surprise was essential, so there would be no preliminary bombardment, and these instructions insisted that the greatest care should be taken not to divulge the presence of increased artillery to the enemy. Registration and calibration was to be carried out by order of the General Officer Commanding the Third Army Artillery.