Operation Blackcock was a World War II military operation carried out by the 7th Armoured Division, the 43rd Wessex Division, and the 52nd Lowland Division, from the British 2nd Army, to clear the Roer Triangle formed by the towns of Roermond, Sittard and Heinsberg, near the Roer River, on the border between the Netherlands  and Germany, from January 14 to January 26, 1945.

Operation Blackcock was planned and executed along three axis. The left axis, constituted by 7 Armourd Division, captured the bridge across the Roer in Sint Odiliënberg. The centre axis, formed by the 52nd Lowland Division, took Heinsberg. The right axis cleared the area south-east of Dremmen and was conducted by the 43rd Wessex Division. This axis would use the break in the German defense line that was to be created by the Lowland Division.

A turning point in Operation Blackcock was the battle for the Dutch village of Sint…