Angband was Melkor's fortress in the north. Sauron was the lord of it, until Melkor returned from Aman after being captured and imprisoned, following the War of the Powers. When Melkor returned, he raised great mountains to its sides, called Thangorodrim, and he almost never left his settlement there. Over the next hundreds of year, Melkor would send out many evils from Angband in an attempt to conquer to inhabitants of Beleriand and eventually all of Middle-earth again. Angband was finally breached and Melkor overthrown in the War of Wrath.