When were the canadians sent in World War 1 to go to ypres?

Canadian troops were sent to the First Battle of Ypres in April 1915, where they played a crucial role in defending the town against German forces. The battle lasted until May 1915 and marked one of the first major uses of chemical weapons in warfare. Canadian soldiers faced intense fighting and significant casualties, solidifying their reputation for bravery and resilience during the war.