I'd just like to note that the Royal Armouries Museum in Leeds has a probably-unique surviving suit of elephant armour, which is displayed on a stuffed elephant in pride of place:

https://i.pinimg.com/originals/43/bb/15/43bb154f887b493c76c3...

Not on display due to conservation issues (but noted on the display text) are the tusk swords, because once you've got an angry Indian elephant wearing armor pointed at the enemy why wouldn't you strap a pair of giant swords to its tusks?

If you're ever in Leeds — in the UK — I'd highly recommend a day trip to the Royal Armouries, especially if you have any kind of interest in the history of armour, guns, and murder cutlery.

(Posted to add a reality-based perspective to the 100% fictional imagery of war elephants in the OP.)