In the First Age, the Dwarves made alliances with the Elves, and both prospered from trade. Dwarves from Belegost invented the famous Dwarf-mail of linked rings and fashioned the finest steel the world had ever seen. They also constructed the hall of Thingol, Menegroth, and were rewarded with the pearl Nimphelos. They fought alongside Elves and Men and participated in some of the major battles of the First Age, including The First Battle of Beleriand and the Nirnaeth Arnoediad in which the Dwarves of Belegost won great renown for being the only ones able to stand against the dragon Glaurung, for 'it was their custom moreover to wear great masks in battle hideous to look upon', which 'set them good stead against dragons', and besides they were 'naturally able to resist fire better than elves or men'. In that battle, Azaghâl the Lord of Belegost was killed by Glaurung, who crawled over him. Before dying, the dwarf stabbed at the dragon's belly and 'pricked him so deep that he fled back to Angband'.
