In August 1917, the Canadian Corps captured Hill 70, vital terrain just north of the French town of Lens. The Canadians suffered some 5,400 casualties and in three harrowing days defeated twenty-one German counterattacks. This spectacularly successful but shockingly costly battle was as innovative as Vimy, yet few Canadians have heard of it or of subsequent attempts to capture Lens, which resulted in nearly 3,300 more casualties. Capturing Hill 70 marks the centenary of this triumph by dissecting different facets of the battle, from planning and conducting operations to long-term repercussions and commemoration. It reinstates Hill 70 to its rightful place among the pantheon of battles that forged the reputation of the famed Canadian Corps during the First World War.