Stormhome & Eberron
From the Eberron Campaign Guide:
Near the midpoint of the Last War, Aundair was forced to pull its defenses from the Eldecn Reaches’ rich farmland and verdant forests to protect its cities. In doing so. Aundair effectively left the folk of the west to defend themselves against the forces of Breland and the bandit armies funded by Karrnath and the Lhazaar Principalities.
Faced with bloodshed and the threat of annexation, the Wardens of the Wood raised an army of druids, rangers, and fey from the Towering Wood. With each victoryc the Wardens rallied the Reachers. who quickly declared their independence. The Thronehold Accords recognized the Reaches as a nation, ensuring its independence and its place in the new balance of power.
The vast Towering Wood covers most of the Eldeen Reaches, untouched and unspoiled. Along its eastern border spreads fertile farmland ideal for farming and livestock. The Reaches are home to a diverse population, with humans. half-elves, eladrin, elves, centaurs, shifters, and others living more or less in harmony. The folk of the west are deeply steeped in the druidic traditions. Reachers in the east swear fealty to the Great Druid Oalian, but they have little direct exposure to the druids and their ways aside from the scouts and advisors who pass through their towns and Villages.