The guarded Kingdom.
Land of the Girdle.
The realm of Thingol and Melian in Beleriand. Sacked and abondoned in F.A.506. The confines of Doriath was to the North the Forest of Neldoreth and to the South the Forest of Region and river Aros. Between Neldoreth and Region ran river Esgalduin. The Forest of Brethil belonged to the realm of Doriath but was not protectet by the girdle of Melian. Before Melian had used her pover to fence of the realm it was known as Eglador.(Sil) In Doriath between the river Esgalduin and Aros in the forest of Region was Menegroth the Thousend Caves, the dwelling of Thingol and Melian. After the sack of Menegroth and the death of Thingol and Beren One-hand, Thingols grandson Dior re-established the Kingdom for a while but Melian went back to Valinor and Doriath had no longer her protection. The sons of Fëanor heard tidings of the Nauglamir and the Silmaril ( F.A.505 ) and demanded Dior to give up the jewel but that Dior would not. The sons of Feanor gathered there force and attacked Doriath and a battle was fought on the East-marches ( F.A. 506 ) where Dior was slain. but also Celegorm, Curufin and Caranthir died. This battle ended the realm of Doriath.
Related links.: Encyc.: The ruin of Doriath.