The Canadian Corps captured Vimy Ridge in April, 1917, in a daring attack that was a turning point in the war, and as Currie called it, "the grandest day the Corps ever had". During the German spring offensive of the spring and summer of 1918, the Canadian Corps supported British and French soldiers while they held the Germans back. Between August 8 and 11, 1918, the corps spearheaded the offensive during the Battle of Amiens. Here a significant defeat was inflicted on the Germans, causing the German commander-in-chief, General Erich Ludendorff, to call August 8 "the black day of the German army." This battle marked the start of the period of the war referred to as "Canada's Hundred Days". After Amiens, the Canadian Corps continued to lead the vanguard of an Allied push that ultimately ended on 11 November 1918 at Mons where the British Empire had first met in conflict with Imperial German forces in 1914.