Other nation\'s recruitable units
 

When you capture another nation's home province usually you can't recruit their units, but there are some exceptions. Basic Pythium gives you hydra hatchlings and Black Forest Ulm gives you Fortune Tellers, Undead Guardians, and those wolf trainers (forget the name). Any others? I guess none of those units are worth basing a strategy around (Fortune Tellers aren't bad, though) but it can be a minor incentive to attack someone.