• -10400 DR
  • Dark elves of Clan Sethomiir travel by magic to the Riildath (present-day Rawlinswood and Forest of Lethyr) from Ilythiir, guided by the hand of the balor Wendonai. They construct an underground fortress named Narathmault, "the Dark Pit", at the site of present-day Dun-Tharos, recognizing it as a place of great evil. »

  • -9750 DR
  • The Riildath (present-day Rawlinswood and Forest of Lethyr) is settled by moon elves and gold elves of Shantel Othreier fleeing the persecution of the Vyshaan of Aryvandaar, becoming the realm of Lethyr. The elves of the Riildath discover the horrors of Narathmault and resolve to clear the forest fo all N'Tel'Quess (non-elves) so as to safegaurd them from the foul legacies of Ilythiir. »

  • 726 DR [Year of the Dowager Lady]
  • Impiltur is overrun by the Scaled Horde, an army of demons, from the western fringes of the Rawlinswood and the Forest of Lethyr. King Forvar II of Impiltur, along with his wife and infant son, Prince Forvar "the Younger", is slain in the fighting, bringing an end to the Durlarven Dynasty of Old Impiltur. King Agrosh "the Scaled" Tarrik, half-fiend son of Errendil Tarrik seizes the throne (some whisper that Agrosh is the son of the demon-lord Eltab).

    One the eastern shores of the Easting Reach, the lack of organized resistance (outside Milvarn) allow individual fiends to rampage unchecked through what is now Thesk. One of these fiends is the succubus, Soneillon (though some schoolars claim this is not her true name, but the name of a female demon lord, whose guise she assumed), the Queen of Whispers, and the consort of Agrosh the Scaled. »

  • 800 DR to 850 DR
  • Homesteaders from Impiltur settle the eastern shores of the Easting Reach and push inland south of the Forest of Lethyr. »

  • 1364 DR [Year of the Wave]
  • Lord Uthlain inherits the throne of the Great Dale from his father, Lord Uthrain. The elder lord is killed in a hunting accident initially blamed on the rangers of the Forest of Lethyr. A group of adventurers tracks down the real killers, servants of the Shadowmasters who hoped to destabilize Uthmere. »

  • 1368 DR [Year of the Banner]
  • A strange plague sweeps through the Forest of Lethyr, destroying the minds of many treants and reducing them to mere trees. »

  • 1371 DR [Year of the Unstrung Harp]
  • The Rotting Man, the chosen of Talona, and his army overruns Dun-Tharos (in the Rawlinswood), driving the nentyarch, the leader of the druid circle of Leth into exile at Yeshelmarr (in the Forest of Lethyr) of the Great Dale. »