THE HORSE IN WAR For at least the last six and a half thousand years men have ploughed with horses, hunted game with horses, pulled vehicles with horses, moved goods with horses, used horses for sport and eaten horses, but most of all they have used them for war. The first recorded case of equestrian warfare is dated to around 2,500 BC in Mesopotamia – although there were almost certainly mounted warriors well before then – and as late as the Second World War both German and Russian armies fielded mounted cavalry units, while at the beginning of that war, in all armies except the British, artillery pieces and transport wagons were much more likely to be horse drawn than propelled by an internal combustion engine. Today both the Chinese and Russian armies still maintain horsed cavalry units. Until the development of reliable motor vehicles with a cross-country capability, the horse was the fastest means of moving guns, equipment and men across country from one point to another.
I found this your best yet. Plenty of interesting material. Would make a good print piece too for a history mag.