 Complete the following phrase:  The First Army went on to fight in Operation Totalize and Operation Tractable and the Battle of the Falaise Pocket, followed by the clearing the Channel Coast. Crerar was recovering from a bout of dysentery during the Battle of the Scheldt in October 1944 and his role as GOC was assumed by Lieutet-General Guy Simonds, the commander of II Canadian Corps. Crerars First Army, reinforced with the British XXX Corps, under Lieutet-General Brian Horrocks, played a major role in the Battle of the Reichswald Forest, codenamed 