Harrowheart is more a preserve or reservation than an actual Kingdom. During the last war, the Centaur clans aided Sussuria in its defense against Azrac. In return, the clans were given the plains between the two kingdoms, their ancestral homeland. Here the clans have ruled and wandered for ten thousand years.
The Centaurs are a nomadic people and wander the width and breadth of their homeland. Because of this lifestyle, there are no villages (except for the occasional seasonal camp) found anywhere.
Aside from Centaurs, scattered groups of other races, usually merchants, can be found traveling across the plains to other kingdoms or bartering with the Centaurs.