In Civ 4, all civs could have War Elephants. In Civ 5, they are restricted to India and Siam.
I have an idea to allow War Elephants, later upgrading to Naresuan's Elephants (maybe with a more appropriate name) for every civ, requiring Ivory.
War Elephants should be able to move through rough terrain, and be unaffected by spear or pike units. They would have no defense bonus.
If India and Siam need to be compensated for having no unique units, they could get some extra bonus from their unique buildings.
I have an idea to allow War Elephants, later upgrading to Naresuan's Elephants (maybe with a more appropriate name) for every civ, requiring Ivory.
War Elephants should be able to move through rough terrain, and be unaffected by spear or pike units. They would have no defense bonus.
If India and Siam need to be compensated for having no unique units, they could get some extra bonus from their unique buildings.