bigpigeon.us webpage WWII-Germany > The ETO > Siegfried Line 1945 > Operation Blackcock, updated by RAC 12 Sep 2022.
 Operation Blackcock, conducted by the British Second Army's XII Corps from 13 to 27 January, drove Germany forces from a triangular area between the Maas River in the Netherlands and the Roer River in Germany. This area is shown on the accompanying map.

The success of Operation Blackcock was marred by Royal Canadian Air Force bombing raids on the village of Montfort, which killed 186 Dutch civilians.

​To my knowledge, no US forces were involved in Operation Blackcock.
Operation Blackcock
Operation Blackcock - British Second Army, January 1945
Sources for Big Pigeon's Siegfried Line 1945 > Operation Blackcock webpage:
  • The Last Offensive, by Charles B. MacDonald, 1972, ~532 pp. [CMH #7-9] - the 1945 ETO Rhineland Campaign.