Soldier and horse model protective masks (First World War)

A soldier and horse model protective masks, Canadian Army Veterinary Corps Headquarters, Shorncliffe, England, circa 1916.

Department of National Defence/Library and Archives Canada 3194261

At Ypres, the Canadians were unprepared for the surprise use of poison gas. By 1916, Canadian forces were equipped with the smallbox respirator, like the one seen here.