The brigade was now under the command of XII Corps. The next operation, known as "Blackcock", was to begin as soon as the ground, by now completely snow-covered, would carry tanks. Its object was to destroy all German troops east of the Koer between Roermond, Geilenkirchen and Sittard. The SRY was to support the 52nd (Lowland) Division in a frontal attack, while the rest of the brigade, with the 155th Infantry Brigade under command, was to operate independently under 7th Armoured Division. The plan was to follow close on the heels of the 7th Armoured Division, break-out at the northern end of the line and then to turn sharp right, coming down behind all the German positions confronting the 52nd (Lowland) Division.