Tel'Ar Mil

The Tel'Ar Mil, roughly translating as “The Great Accord” was the rule under which the feyed eladrin organized themselves. They lived in various circles, each promoting the circle of life, both in their environment and their societies. The circles went through periods of growth and deliberate decline to stay in balance with the Arbormonde and the surrounding Evergreen Woods.
As the days, years, and ages passed, different circles were granted different weight. Sometimes a minor circle was elevated to a key decision maker in the great accord, while a previously great circle let themselves wither and decay. How these decisions were made is not entirely clear. It seems like the entire race simply “knew” which circles to elevate. Imperial scholars have postulated that the feyed elardrin's limited capacity to divine the future was related to this.
The feyed eladrin, lived amongst the branches, roots, and shadow of the Evergreen Woods, tending to it and the flora and fauna within it. They usually lived in small villages or nomadic tribes, but their capital, Radh'enial on the Arbormonde, was a city to rival any other of it's time. Grown over many years, slowly and deliberately, it is as much part of the Arbormonde as it exits on top of it.
The feyed eladrin had little interest in the outside world, nor its troubles. However, as the War between the humans, dwarves, shortfolk and high-elves intensified, they began to cut lumber from the Evergreen Forests. This was not the first time that the other mortal races overreached into the forests and the feyed eladrin dealt with them as they always had: they confused the interlopers, destroyed their tools, gave them some minor illnesses and sent them back home.
This all changed when a large army of shortfolk invaded the northern Evergreen Woods and began to clear the forest on a massive scale, establishing a fort, deep in the forest from which they could organize their operation. The Tel'Ar Mil for the first time in its history mustered its forces and marched to war, leading to the Battle of Broken Timber. While the armies of Tel'Ar Mil were successful, the feyed eladrin became much more aggressive in defending the woods, preemptively attacking and killing would be foresters. These killing drew reprisals and would eventually drag the feyed eladrin into the War of the Five.