Question: When was the 1st Earl of Ypres born who attacked attacked the Boer force from the rear while mounted infantry?
Sentence (from "1st Battalion, Canadian Mounted Rifles, CEF"): Part of the 1st Brigade Canadian Mounted Rifles, the unit landed in France on September 22, 1915, where the conditions of the Western Front made its mounts more of a hindrance than a benefit.
Relevant evidence: No