After the Rebellion of the Ñoldor, this land was committed to the rule of Caranthir, the fourth Son of Fëanor, and after him it was often called Dor Caranthir and Talath Rhûnen.  The Dwarf-road passed through the southern tip of this land and as this was Caranthir's territory all who trafficked through there pay toll to Caranthir, thus making him very wealthy.
The Haladin briefly dwelt here until they were nearly wiped out in an Orc-raid. Thargelion was ravaged by the Orcs of Morgoth during the Dagor Bragollach forcing Caranthir and his people to flee.
Other versions of the legendarium
|Foreign Language||Translated name|
|Chinese (Hong Kong)||薩吉理安|
|Danish||Thargelion ("Landet hinsides Gelion")|
|Kazakh||Тһаргеліон (Cyrillic) Thargelion (Latin)|
|Serbian||Таргелион (Cyrillic) Targelion (Latin)|
|Uzbek||Таргелион (Cyrillic) Targelion (Latin)|
- The Atlas of Middle-earth, Thematic Maps, "Languages"
- The Atlas of Middle-earth, The First Age, The Elder Days, "Beleriand and the Lands to the North"
- The Silmarillion, Quenta Silmarillion, Chapter XIV: "Of Beleriand and its Realms"
- The Silmarillion, Quenta Silmarillion, Chapter XVII: "Of the Coming of Men into the West"
- The Silmarillion, Quenta Silmarillion, Chapter XVIII: "Of the Ruin of Beleriand and the Fall of Fingolfin"
- The Silmarillion, Quenta Silmarillion, Chapter XXIV: "Of the Voyage of Eärendil and the War of Wrath"
- The Atlas of Middle-earth, The Second Age, "Introduction"
- The Silmarillion, Appendix: Elements in Quenya and Sindarin names
- Parma Eldalamberon, Words, Phrases and Passages in Various Tongues in The Lord of the Rings by J.R.R. Tolkien
- The History of Middle-earth, Vol. 5: The Lost Road and Other Writings, Part Three: "The Etymologies"
- The History of Middle-earth, Vol. 11: The War of the Jewels, Part Two: The Later Quenta Silmarillion, XI: "Of Beleriand and its Realms"