FriendlyFire
Codex WMDicanious
Elephants suck Alexander killed them all again anyway.
Iam amazed that Heavy Infantry was able to stand up to Elephants, The Romans used light skirmishers to counter elephants, generally a few javelins to the elephant is enough to cause it to panic
I also would have thought the Indians would have been given chisels and hammers by the elephant driver to kill the elephant to prevent it from stampeding there own troops.
Defeating 100 Elephants is impressive, I'd imagine they would have made a mess against any other army of that era.