Vimy Ridge stands on Hill 145, the highest point of the 14 km long Vimy Ridge. In the First World War, the Ridge was a highly significant part of the German defence system. At daybreak on the 9th April 1917, all four divisions of the Canadian Corps stormed the Ridge. By mid-afternoon, they had taken all their objectives except Hill 145 which was captured the following day. Out of 10,602 causalities, 3,598 Canadians gave their lives. The monument took eleven years to build and rests on a bed of 11,000 tonnes of concrete, reinforced with hundreds of tons of steel. Carved onto the walls of the monument are the names of 11,285 Canadian soldiers who were killed in France and whose final resting place is unknown.