Dwarves of the Blue Mountains
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|Dwarves of the Blue Mountains|
|"Blue Mountain Dwarves" by Angelo Montanini|
Newer halls in the Southern chain
|Lifespan||c. 250 years|
|Distinctions||Beards, skilled warriors|
|Average height||Five feet or less|
 Second Age
After the War of Wrath, much of the Ered Luin fell into the sea, and stunted the mountains (such as Dolmed, and Rerir). The Dwarf cities of Nogrod and Belegost, home to the Firebeards and Broadbeams were also ruined. Most of the two Houses left the Ered Luin for Khazad-dûm home of the Longbeards, bringing much lore and craft and swelling its numbers. Others stayed to build or rebuild their homes, and start over again.
For hundreds of years the remnants of the Firebeards and Broadbeams toiled in the Ered Luin. The remnants of the two Houses seemed to having largely moved to the Southern range by the mid-Third Age. They likely trafficked and traded with the Elves of Lindon, the Men of Eriador and of course with Durin's folk.
 Third Age
After the death of King Thrór, his son Thráin sent messengers to all the Houses of the Dwarves requesting aid, and it can be assumed that both the western houses sent troops to fight in the War of the Dwarves and Orcs.
After the War, the remaining Western Dwarves went back to their countries, and a year later King Thráin and his people established a new realm-in-exile in the Northern Ered Luin beyond the Little Lune. This territory may have been given to them by the western Houses (It was part of their territory). His people prospered in a fashion, and were swelled in numbers by many of the wandering folk of Durin. They made things mostly of iron, trading with their neighboring kinsmen in the south, the Men of Eriador, and likely the Elves.
Years later after King Thorin went on the Quest of Erebor and was killed in the Battle of Five Armies, the Kingdom under the Mountain was re-established by the new king Dáin II Ironfoot. Many of the people of Durin's folk went to him and it became a great and prosperous kingdom once again. So a much smaller group of Durin's folk lived in the Ered Luin, if any. However the Firebeards and Broadbeams continued to live their through the Fourth Age, and probably till the diminishing of the race of Dwarves (There were and always will be Dwarves on the eastern side of the Blue Mountains).