The realm was established after Beleg agreed to join his good friend in opposition to the orcs infesting the area. This resulted in an alliance which protected an area that occupied a land between the river Teiglin and Talath Dirnen. It was during this time that Túrin went by the name Gorthol. For almost a year, the alliance held off the Orcs of Morgoth until the treachery of Mîm the dwarf brought it to a bloody end. Túrin's location was eventually discovered and orcs slew the outlaws, covering the hilltop with real blood putting an end to the Dor-Cúarthol.