A Problem of GeographyEastern Emperor Island is cut almost in half by the Abban range of mountains, incidentally the source of most major water ways in the region. The mountain range reaches just shy of the coast to both the north and south and is itself cut in twain by the Abbanfahr; the pass of least resistance, and a natural choke point into the region beyond.
In the lush, often forested and well irrigated land to the east of the Abban Range stretching all the way to the far eastern shores lays Auberyth a nation ruled from the capital Cabhairau.
To the far south is the region's largest bay, home to a group of islands (the Sinsar Boch) which a loosely organised tribal people call their home.
Finally the steppe and rolling plains to the west, bordering on Emperor Island's central desert, play host to the Lasuech, the "People of Lasuell".
Inspite of the three nations being legitimately separated by geography--The Sinsar Boch from the main land, and Lasuell from Auberyth by the Abban Range--the city of Cabhairau remains by tradition a sort of feudal seat of power.
While it would be nigh impossible and incredibly foolish to attempt such total rule, the Lord of the Auberyth often retains the region's choke points (The Abbanfahr and the Waters of the southern bay) in an attempt to impose a measure of control.
Needless to say the effectiveness of this pursuit ranges from pointless and needlessly time consuming, to actually fairly successful... depending of course on the current state of trade negotiations between nations, the state of the army of Auberyth, and the morale of the people the Lord believes he rules. The people would revolt if they could amass an army to rival Auberyth's... or if they cared.
Case in point: the Lasuech are little put off by the Lord Cabhairau's obsessions as they could easily trade via Kilvikasa and the coast instead. Additionally, most settlements within either of the two larger nations remain mostly autonomous of any outside influence (aside from when Auberyth decides to impose troops upon them, or demand tribute).