5924392 A line of horses pulling heavy transport across the desert in Palestine, October 1917 (b/w photo) by Unknown photographer, (20th century); National Army Museum, London; (add.info.: A line of horses pulling heavy transport across the desert in Palestine, October 1917 Photograph, World War One, Middle East (1914-1918), Palestine, 1917 Image caption states: ?Heavy transport crossing the desert in Palestine, Oct 1917? Horses played an essential role during the Sinai and Palestine Campaigns, transporting supplies and ammunition. But casualty rates were high in the unforgiving desert terrain, in 1916 the Army lost an average of 640 horses a week. From a collection of photographs taken by Corporal Joseph Egerton, Shropshire Yeomanry in Sinai and Palestine); by National Army Museum ; out of copyright.