"Many animals were used during WW1. Horses, mules, dogs and pigeons were vulnerable to poison gases so that special protection was necessary for them. Horses were equipped with gas masks over their muzzles and were protected from inhalation of poison gases such as phosgene. Equine eyes were not affected by lachrymatory agents so that their masks consisted only of specially made nose bags but, unfortunately, these animal’s eyes were vulnerable to the effects of chlorine and vesicatory gases. Of the million British horses sent overseas to help with the war effort, only 62,000 returned home. This is the forgotten tragedy of the Great War – a conflict that pitched as many animals into the line of fire as it did humans. For years few knew of the unimaginable suffering of the beasts transported across the Channel to the Western Front."