 Major General Rod Keller was removed from his command of the 3rd Canadian Infantry Division , after having been badly wounded , when his headquarters were hit by American bombs . Keller 's poor performance in Totalize lost him the confidence of General Crerar and he received no further command positions for the remainder of the war . Simonds and Crerar mounted a follow @-@ up offensive , Operation Tractable , which took place between 14 and 21 August . On 21 August , the Falaise Pocket was closed when Canadian and Polish units made contact with US troops to the south , ending Commonwealth participation in the Battle of Normandy with a decisive Allied victory . 
