 On 24 July, the battalion was placed under command of 5 Brigade to secure the start line for the brigade's attack on May-sur-Orne and Fontenay-le-Marmion.A composite force from "B" and "D" Companies under Major Lane met fierce resistance and reinforcements were needed before the start line was secured.Still under 5 Brigade, the Camerons had elements of The Black Watch of Canada and The Calgary Highlanders placed under command on 25 July, to occupy Saint Martin to protect the left flank of le Régiment de Maisonneuve attacking May-sur-Orne.