German attack on Vimy Ridge, 21 May 1916
In 1932, Edmonds recorded 1,344 German casualties; 615 men in the attack and 729 during British counter-attacks. British casualties in the 47th Division from 22 to 24 May were 1,571, 2nd Division casualties were 267 and the 7th Brigade (25th Division) had 637 casualties, a total of 2,475. In 1936, the official historians of "Der Weltkrieg", the German official history, recorded that 300 British prisoners had been taken.
Henry Horne, 1st Baron Horne
The attack on Vimy Ridge was spearheaded by the First Army's "shock troops" (the Canadian Corps). The ensuing Battle of Vimy Ridge, the first of a series of actions known as the Battle of Arras was successful: supported by Horne's 1,000-odd artillery pieces, the Canadian forces took the ridge in four days, with approximately 10,000 casualties (against 20,000 German casualties). The capture of Vimy Ridge would prove essential to the British Army: it served as the backbone of the British defence from March 1918 onward.