I want to create a Pathfinder campaign for my players that culminates in a war between fantasy cities. I've been researching mass combat rules looking for something comprehensive that effectively deals with fantasy worlds beyond 'just' incorporating magic. I've yet to find anything that specifically deals with mass combat in various standard fantasy environments:
- Aerial Mass Combat (i.e. more than dogfights between individuals, the entire army/unit is capable of flight)
- Underwater Mass Combat (Atlantis vs. Lemuria, anyone?)
- Mass Combat between these environments (Atlantis vs. Laputa)
- BONUS: Other-planar environments
The 3D nature of each of these environments opens up very different strategies and tactics. I.e., What does 'high ground' mean exactly? If an army has highly buoyant weapons in the underwater setting, can they bombard the enemy from below in the same way as a flying army could do to an earth-bound one?
Are there any game systems that address mass combat in any of these environments?
The best answer would be for something that is specific to 3.5 or Pathfinder, but I've given up hope in finding something like that. I'd look at anything that has been play tested. I'm always concerned about balance. Possibly something from the Sci-Fi genre?