So long and short through a combination of maps, mapping, and several campaigns a few of my nations are getting radically reworked.

To put it simply I am shifting the nation of Arcadia from being along the eastern coast of the continent to the western coast to match up with Rivermoot and Aghul.

Now the biggest hurdle for this is Rivermoot at one point conquered Aghul for an extended period of time and Aghul's southern border is explicitly running against the empire of Suhndar.

Suffice to say I'm debating shifting the invasion to have been a navel one or including some Arcadian nobility that expressly allowed Rivermoot armies to progress through their territory unimpeded.
Now this is all in the name of shifting the mountain range that runs along Aghul and Arcadia's border to be a unifying wall for them against the monsters to the east of it instead of a border that stopped the ability to aid allies.
This also obviously lets me radically remap that region to be far more hostile to life.

And I was looking for ideas and suggestions on this front.