The country of Eregion was founded by the Noldor Elves in 750 of the second age. Elves lives in Eregion. And also the dwarves often came to Eregion for trade. The Eregion Elves are the best blacksmiths of that period. One day, Sauron goes to Eregion and deceives the blacksmith Elves. And that's why Eregion's Elves made power rings. Later, Elves realized that Sauron had deceived them and after they hid some of the rings. Sauron then began to attack Eregion. Although Elves tried to resist, they failed. And the land of Eregion was destroyed by Sauron.