Best way to handle troop positioning on a Risk-like game.

I’m developing the PC version for the Game of Thrones boardgame and I’m a bit confused about what is the best way to position troops on each territory. I’ve made the boardgame on 3ds and each territory is a game object, but since these territories aren’t a regular block with a single coordinate I don’t know a good way in order to arrange each troop unity that is going through the territory.

I would find the vertex in the center of the mesh and use that as a positioning element.

How did you create the game objects for the territories? Did you create each one manually or generate them automatically from an image?