Used for transportation and cavalry charges since ancient times, like in Napoleon's army.
Ancient Indians and Egyptians employed elephants as war machines with howdahs carrying soldiers or projectiles.
Carried messages between troops during World War I & II using Morse code on their legs or wings.
Served various roles such as mine detection, messenger relay, search-and-rescue during wars throughout history.
Soviet Union trained dolphins to pull underwater mines attached to ropes during the Cold War era."
Trained by Japanese forces in WWII for carrying grenades strapped around their midsection near enemy lines, known as 'monkey bombs'.