The Battle of Vimy Ridge was fought from the 9th to the 12th of April in 1917. The battle took place at Vimy in Pas-de-Calais, France. There, Canada, along with Britain, took on the German Empire. There were an estemated 10,602 Canadian casualties, including 3,598 killed in battle. There was an estemated 20,000 Germans casualties as well.
(Ranked -1 on progress for so many losses)