Kavan
Kavan was the last stronghold of the Elves of Crystal, formed in the wake of the Sundering Wars and the Descent of the Drow. Determined not to repeat the mistakes of the civil wars which raged for thousands of years and nearly destroyed the Tel'Quessir, the survivors founded Kavan deep in the Forests of Tro, as a refuge and sanctuary for the remnants of Elvenkind ("kavan" means "sanctuary" in Mithrandic Elven). The last great city of the Elves, Vanderon, towered above the forest floor and the nearby waterfalls, serving as Kavan's capital. It and the rest of the small kingdom was protected by a paling said to be the greatest single act of magic ever performed by the Elves, layers upon layers of complex illusions believed to be reinforced by the Orlythae themselves, and no one but the Elves and those deemed Elendili ("Elf-friends") could set foot within its borders; all others would be immediately put to death.
Naturally, when the Xsians invaded the forest, the Kavanians were not pleased. The Xsians claimed Tro as part of their massive Empire, but the Elves remained defiant, dismissing the claims of the human barbarians from the East. What followed was a protracted guerrilla war that would last for generations, and only due to the sheer numbers of the Xsian forces.
Kavan's only official ally was the Xanthyr Nation, who also resisted the Xsian invaders. While individual Beorn were granted the status of Elendil, the Elves did not trust them for the most part, and kept them at arm's length except when it suited their purposes.