Animals have long been used for war. They are not only used to attack, but also to carry messages and soldiers, and even as spies. They have been used for thousands of years, and are still being used. Ancient Peoples used war dogs, pigs, horses, elephants, and even rhinos and cheetahs. Horses, mules, pigeons, oxen, bats, turkeys, donkeys, camels, water buffalo, and moose have been used to transport military goods. Carrier pigeons have delivered messages in times of war for hundreds of years up until as recently as World War II, also, more recently, pigeons with cameras have been used to spy on enemies, and have had bombs attached to them. The Ancient Indians (from India) trained elephants to carry soldiers and supplies, and to break down enemy walls and buildings. Horses have carried soldiers for thousands of years, up until the Civil War. Attack dogs have been used for thousands of years. The Ancient Romans used war pigs. Hannibal attacked Ancient Rome with elephants over the Alps. The Ancient Assyrians trained cheetahs to fight in wars. During World War II, bats with tiny bombs attached were released over Japan and flew into homes and buildings which then burned down. If you ask me, very unfair to the bats.The Navy uses dolphins and sea lions to detect underwater mines. The Army uses dogs to look for land mines. At one time, they also used chickens to search for poisonous gases. Even during the Cold War, the C.I.A. made a Cat Camera, basically a cat with tiny cameras and microphones, to spy on the Soviets. Project Acoustic Kitty, it was called, cost ~$10,000,000. It was quickly abandoned when the cat got hit by a car. During World War 2, moose were used by the Soviet Union and Sweden to carry supplies through snow.