Under Thrór's reign, Erebor became a great Dwarven stronghold, where the Dwarves became a numerous and prosperous people.

After the death of Thorin Oakenshield in the Battle of the Five Armies, Dáin became King of Erebor until his death during the War of the Ring.

After the death of his father, he became the Lord of the people of both Erebor and the Iron Hills.

Both the Ered Mithrin and Erebor were later occupied by Dragons, and they then became a wandering folk in exile.

Finally, the Dwarven Kingdom of Erebor was restored when Dáin II, Lord of the Iron Hills, became King of Erebor in after Smaug's death.

The Dwarves of Durin's Folk prospered in Erebor, and there are indications Gimli led a group of dwarves to Aglarond.

After the end of the First Age, when the ancestral homes of the Broadbeams and Firebeards were ruined, many dwarves from these clans crossed Eriador and merged with Durin's Folk in Khazad-dûm, although remnants of these two western nations may well have survived as independent entities in the Ered Luin ; seven rings were given to ' the Dwarf Lords ' by Sauron in the Second Age, for example, and certainly the Blue Mountains remained permanently inhabited by dwarves of one clan or another throughout the history of Middle-earth: Thorin Oakenshield, for example, grew up there as an exile from his homeland Erebor, and several of his companions on his quest to reclaim that realm were not related to him ( Bifur, Bofur and Bombur ).

In the Third Age, after being driven out of Moria by the Balrog Durin's Bane, most of Durin's Folk fled north and established cities in Erebor and the Ered Mithrin.

" The Quest of Erebor " was originally written in the 1950s to be a part of The Lord of the Rings Appendices but Tolkien decided not to include it due to space limitations, and only a very abridged version of the tale occurred in Appendix A, III Durin's Folk.

Durin VII or Durin the Last was the direct descendant of king Thorin III Stonehelm ( according to some sources, his son ), ruler of Erebor and the Iron Hills in the Fourth Age.

Although the Cirth were later largely replaced by the Tengwar ( which were enhanced and brought by Fëanor ), they were adopted by Dwarves to write down their Khuzdul language ( Angerthas Moria and Angerthas Erebor ) because their straight lines were better suited to carving than the curved strokes of the Tengwar.

In, Gandalf arranged ( and frequently accompanied ) a band of thirteen dwarves and the Hobbit Bilbo Baggins to reclaim from the dragon Smaug the Dwarves ' lost treasure in Erebor.

He turned up again, however, before the walls of Erebor disguised as an old man, revealing himself when it seemed the Men of Esgaroth and the Elves of Mirkwood would fight Thorin and the Dwarves over Smaug's treasure.

The Dwarves of Erebor were at that time well known to be skilled in the making of matchless weapons and armour, and there was great demand for their work by the surrounding peoples.

Sauron's messenger attempted to bribe the Dwarves of Erebor for news of Bilbo ( the last known bearer of the One ) with the promise of the return of the remaining three of the Seven.

The Dwarves of Durin's folk under Thorin I abandoned Erebor, and left for the Grey Mountains, where most of their kin now gathered.

The Great Gate was rebuilt of mithril ( the hardest of all metals in Tolkien's writing ) and steel by Gimli and Dwarves of Erebor from the Lonely Mountain who had settled in the Glittering Caves.

The exiles who settled in the Iron Hills were of course in friendly relations with the Dwarves of the Lonely Mountain ( Erebor ), who were of similar like and mind, being kin to Grór and Thrór.

Dwarves from Moria founded the Kingdom under the Mountain at Erebor, first in and later returning from the Grey Mountains in.

The Dwarves of Erebor and the Men of Dale were destroyed and scattered when the dragon Smaug took Erebor in.

Many Men and Dwarves take refuge in Erebor.

** Thráin I, first King of Dwarves at Erebor

At this time all of the old lands of the Dwarves were reclaimed by Durin's folk, including Khazad-dûm, Erebor, the Iron Hills, Gundabad, the Blue Mountains, the Glittering Caves of Aglarond, and many small dwellings in the Misty Mountains.

The Dwarves of the Lonely Mountain ( also known as Erebor ) and the Men of Dale refused to acknowledge the overlordship and alliance of Sauron.

A similar fate happens to the Dwarves: although Erebor becomes an ally of the Reunited Kingdom and there are indications Khazad-dûm is refounded, and a colony is established under Gimli in the White Mountains, they become ever more reclusive, and disappear from human history.

After dragons plundered their hoards, the Longbeards, led now by Thrór, a descendant of Thorin, returned to Erebor to take up the title King under the Mountain.

Toward the end of the Third Age, the Kingdoms of Erebor and Dale were restored after the death of Smaug and the Battle of Five Armies, and, attacked by the White Council, Sauron withdrew from Mirkwood to Mordor.

* 2845-Thráin II is captured by forces of Sauron and imprisoned in Dol Guldur after having wandered for four years trying to reclaim the lost treasure at Erebor and the last of the Dwarven Rings of Power is taken from him

He was never crowned King, but claimed the title King under the Mountain ( and did in fact have right to it after refounding Erebor ).

Together they planned the Quest of Erebor, which resulted in the death of Smaug and the finding of the One Ring by Bilbo Baggins.

Major features were the forest of Mirkwood, the Long Lake of Esgaroth, and Erebor, the Lonely Mountain.

Sauron's forces were probably more numerous, though the armies of Dale and Erebor would have possessed an advantage due to their superior Dwarven-made weaponry.

A deadly winged fire-breathing dragon, he was described as red-gold in colour and his underbelly was encrusted with many gemstones from the treasure-pile he commonly slept upon once he had taken control of Erebor ( the Lonely Mountain ).

This work explains how and why Gandalf arranged for the retaking of the Lonely Mountain ( Erebor in Sindarin ), an adventure recounted from the perspective of Bilbo Baggins many years before in Tolkien's The Hobbit.

" The Quest of Erebor " is written in the first person, from the perspective of Frodo Baggins.

Since The Hobbit is written almost entirely from the perspective of Bilbo Baggins and contains little that he does not directly experience or at least witness, " The Quest of Erebor " provides additional insight into the events during and preceding the story.

Nevertheless by the time of the Quest of Erebor the goblins of Goblin Town had burrowed their way back to it, and eventually captured Bilbo Baggins and Thorin Oakenshield's Dwarf company.

Aragorn was also held to be the protector of Dale ( which included Esgaroth ), and the Dwarf realm of Erebor, although these allies maintained their own rule and kings.

( This is when Gandalf found Thráin II imprisoned in Dol Guldur and recovered the map and key to Erebor before Thráin died.

" The Quest of Erebor " in Unfinished Tales elaborates upon the story behind The Hobbit.

To the quest, Gandalf contributed a map and key to Erebor.

One of the last great dragons of Middle-earth, Smaug rose to prominence by laying waste to the town of Dale and capturing the Lonely Mountain ( Erebor ) with all of its treasure.

In J. R. R. Tolkien's Middle-earth legendarium, the Lonely Mountain ( Sindarin Erebor ) is a mountain in the northeast of Rhovanion.

Erebor was founded by Thráin I the Old, who discovered the Arkenstone there.

Before the battle began, an army of Orcs and Wargs descended on Erebor.

During the War of the Ring, Dale was overrun by Sauron's Northern army, and many dwarves and men took refuge in Erebor which was promptly surrounded.

Dáin II was killed before the gates of Erebor defending the body of his fallen ally King Brand of Dale.

As told in " The Quest of Erebor ", Gandalf states that the restoration of the dwarven kingdom of Erebor would later prove to be a bulwark against Sauron's Northern allies, even as the main thrust was against Gondor, which otherwise could have done great harm in Arnor and The Shire.

Gimli, a dwarf of Erebor, was later chosen to represent his people in the Fellowship of the Ring and helped Aragorn II regain the throne of Gondor.

" Erebor ", specifically the southern spurs of the Mountain and Dale, is a playable map in The Lord of the Rings: The Battle for Middle-earth II.