The battle of Vimy Ridge began on Easter Monday 9 April 1917 when the Canadian Corps g attacked what was probably the strongest of German defensive position in northern France. The Canadians rehearsed their assault and used miles of tunnels to approach the enemy lines. By midday only the highest point of the Ridge, remained in German hands and that fell 24 hours later. Today the Canadian National Memorial stands on that hill.
The German casualties were about 20,000, the Canadian losses were half that.
Vimy Ridge today has a Canadian Memorial Park where Canadian and German trenches and craters face each other at barely 100 yards distance.