5925342 A veterinary section attending to a wounded mule, November 1916 (lantern slide) by Unknown photographer, (20th century); National Army Museum, London; (add.info.: A veterinary section attending to a wounded mule, November 1916. Lantern slide, World War One, Salonika (1914-1918), 1916. The mountainous terrain of Macedonia was ideal for the deployment of mules and horses. The British Army used thousands of these animals to move its supplies, equipment and the wounded. During the war, the British Army treated its pack animals with greater care than ever before. Around 80 per cent of those treated by the Army Veterinary Corps were successfully returned to the front line. From a box of 111 slides associated with the Balkans, 1914-1918.); by National Army Museum ; out of copyright.