The Iron Hills, located about forty leagues to the east of Erebor, were settled in TA 2590 by Grór and Dwarves of Durin’s Folk after their desertion of the Ered Mithrin. It was one of the two main settlements of Durin’s Folk in the latter part of the Third Age. While the Dwarves of the Iron Hills were prosperous, they were by no means wealthy. The hills were full of iron, as their name suggests, but no gold. The Dwarves of the Iron Hills were noted as helping to turn the tide at the Battle of Azanulbizar in 2799; and in 2941, 500 Dwarves, led by Dáin, marched to Erebor to support Thorin II in the Battle of the Five Armies. Dáin became King of Erebor, and after this, the Iron Hills passed out of record (though they may not have been deserted).