A concise Canadian Divisional History, the 4th served both on the Western Front in France and in Flanders until Armistice Day. They formed part of the Canadian Corps in the Battle of Vimy Ridge, which attacked and defeated the Germans, driving them from the ridge. As a result, the Canadians became known as masters of offensive warfare and an elite fighting force. In the Battle of Vimy Ridge in April 1917, the Division was given the job of capturing Hill 145, the highest and most important feature of Vimy Ridge.