Glaumring is right that there is a shortage of nobles to really force expansion in the manner that was done with Caerwyn. But then again, so far I don't think anyone wants to totally wipe out another realm which that would require.
The inability to wipe out and recolonize the land is going to make this a bit of a different war. The final objective will be to win concessions from the other side, and not land. (Or at least no more than a token region or so.)
