As mascots, messengers, rat-catchers and even spies, animals have long marched into war alongside servicemen and women. Dogs, horses, cats (even birds, camels and elephants) have saved thousands of lives through instinct, intelligence, courage and devotion.
Like Jet, a dog who searched through ruins during the Blitz bombings to find survivors, or Sergeant Stubby, a dog who caught a spy. Or the pi...