From Firingsquad’s look at Rome: Total War units:
Incendiary pigs are ‘one shot’ weapons intended to spread panic and terror amongst enemies, particularly mounted troops. The pigs are coated in pitch, tar and oil, and herded towards the enemy. At the right moment, the pigs are ignited by their handlers and, not unnaturally, they run away in pain and terror – hopefully towards the enemy.
War is hell.
But The Flaming Pigs would make an excellent name for a rock band.
(Dave Barry for President!)