Book excerpt: The Allied campaign for Northwest Europe as seen from a British and Canadian perspective A reinterpretation of the British Army's conduct in the crucial 1944-45 Northwest Europe campaign, this work examines the "Colossal Cracks" operational technique employed by Field Marshal Bernard Montgomery's Anglo-Canadian 21st Army Group. Rooted in concerns about morale and casualties, "Colossal Cracks" was a cautious, firepower-laden approach that involved the concentration of massive force at points of German weakness. Hart argues that Montgomery and his two senior subordinates handled this formation more effectively than some scholars have suggested and that "Colossal Cracks" represented the most appropriate weapon the British Army could develop under the circumstances.