Marshal Foch, the Generalissimo of the Allied Armies during the last stages of the First World War, commenting on the victories won during the Hundred Days when the Germans were driven back on the Western Front, said ‘Never at any time in history has the British army achieved greater results in attack than in this unbroken offensive’. The scale, speed and success of this offensive have provided historians with fertile ground for interpretation and debate. How did the British Expeditionary Force, having endured the bitter disappointments and heavy losses at Aubers Ridge, Loos, the Somme, Passchendaele, Cambrai and during the German spring offensives of 1918 turn the tide of the war and comprehensively defeat the enemy in the field?