Battle of the Bees (played a role in the battle, but not on purpose.)
Just great. Thanks.
Wiki has a brief but interesting entry on animals as military weapons.
I thought fling pig tossing mentioned upthread was a joke. Explosive rats are no different, I suppose.
A wall of pissed-off mother bears. Catapult their cubs into the enemy lines, then set them loose.
Hippo farts in the enemy’s general direction. Where is that damn video cite…? I’ll be back.
Tauntauns. Legions of them.
After reading this thread, you know, war sounds like it could be a lot of fun if we only got some other species involved. Oh, well.
Oh, the Cat Cannon, of course, very viscous:
There’s an ancient claim that Romans lit pigs on fire and drove them at Pyrrhus’ war elephants.