One of the earliest recorded uses of attack animals was during the Diadochi wars in around 300BC. A good century before Hannibal’s legendary trek across the Alps using elephants, the huge beasts were being harnessed. But it was believed that elephants were scared of even a small squeal. So, the Megarians poured oil on a herd of pigs, set them alight, and drove them towards the enemy’s massed war elephants. The elephants bolted in terror at the sight and sound of the screaming pigs. Wouldn’t you? Whether the victorious Megarians feasted on barbecued pork to celebrate is unknown.