Siegfried Line:  Order of Battle, 26 Jan '45     Blackcock     First US Effort     Roer River Dams     Seventh Army  
                           Feb '45 Third Army "probing attacks" - VIII Corps to Prüm     XII Corps to Bitburg     XX Corps to Trier​    
     –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
bigpigeon.us webpage WWII Germany > The ETO > Siegfried Line, 1945 > Operation Blackcock, © 2025 by Robert A. Christiansen, updated by RAC 24 Jun 2025
 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. Note that the US Ninth Army is on the XII Corps right flank.

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

​Operation Blackcock was preliminary to the joint Canadian-British-US Operation Veritable/Grenade of February 1945. 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 WWII Germany > The ETO > Siegfried Line 1945 > Operation Blackcock webpage:
  • The Last Offensive, by Charles B. MacDonald, 1972, ~532 pp. [CMH #7-9] - the 1945 ETO Rhineland Campaign.