This team was organized by this military unit. It was common in the First World War for Canadian Army units to have sports teams while training in Canada.
What was uncommon was the person who was the team's manager. Conn Smythe, who would later own the Toronto Maple Leafs, organized and coached this Ontario Hockey Association senior team in its only season - 1915-16.
The 40th Battery was forced to curtail its season because it was being shipped overseas.