On completion of the relief on May 7, 1918, with the exception of the Second Canadian Division, which was still in the line in the Third Army area, the Canadian Corps was placed in the General Headquarters reserve in the First Army area (Arras sector), and disposed as follows:
Headquarters—Pernes, and later Bryas. First Canadian Division—Le Cauroy area. Third Canadian Division—St. Hilaire area. Fourth Canadian Division—Monchy-Bréton area.
One infantry brigade and one machine-gun company from each Canadian division were billeted well forward in support of the corps in the line as follows:
(a) One infantry brigade, one machine-gun company—Anzin area. Support, Seventeenth Corps.
(b) One infantry brigade, one machine-gun company—Château de la Haie area. Support, Eighteenth Corps.
(c) One infantry brigade, one machine-gun company—Ham en Artois area. Support, Eleventh Corps.
These brigades were kept under one hour's notice from 5.00 a. m. to 7.00 a. m. daily and under four hours' notice during the remainder of the day. The remainder of the Canadian Corps was under four hours' notice.
Reconnoissances of the front which the corps would have to support in case of an attack were ordered and carried out by staff and regimental officers. The brigades billeted forward were relieved from time to time under divisional arrangements.
On May 23, 1918, the Seventy-fourth British Division, newly arrived in France from Palestine, came under Canadian Corps for administration and training. It was necessary to rearrange the areas among the divisions in the corps to make room for the Seventy-fourth Division and to equalize the training facilities. With the exception of these moves, the disposition of the Canadian Corps remained substantially the same until June 25, 1918.
On that date the Second Canadian Division, which had been in the line since March 30, 1918, was relieved by the Third Canadian Division, which came then under the Sixth Corps, Third Army area, with headquarters at Basseux. Readjustments were also made in the locations of all the Canadian troops then in reserve.