D'Hara was formed by Shadovarians. Mind you, ruling elites came and went in waves. Personally, I consider the D'Hara/Shadovar conflict to be nothing else than a civil war, as it was due to a split within a ruling gang that caused a lot of bad blood and bitter fighting. Both parties had come to the lands hand in hand, as far as I know. It's the impression I got from them in the days, at least. I tend to consider Shadovar as being part of D'Hara's history, though I think I'm the only one left in the realm that actually once bore the Shadovarian flag.
I though the main characters that ended up forming D'Hara were the banished PeL rebels? Didn't they rebel in Shadovar, put one of their own on the throne, then had a failing out and split? I arrived in Shadovar only 2-3 days before the whole thing happened. I seem to recall I joined the realm at your suggestion.
