From the papers of Dunbart’s Guide to Telara, Stonefield:

Centuries before it would finally collapse in the Convocation, the Eth Empire very nearly fell to pieces in the many decades that Stonefield fell into the hands of a powerful cadre of titan lords.

These myrmidons were the Eth’s chief guardians of the sourcestone mines, but when the titans broke Eth control, their dominance of Stonefield quickly fell apart.

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The titans drove out the Eth by organizing the beasts of Stonefield against the Telarans. Most of these creatures were at one time from the Plane of Earth, and so it was in their blood to hate Telara and those who lived upon it.

The titans held the mines, and indeed all of Stonefield, for decades, until finally the Eth managed to overthrow the titans and take back Stonefield.