Dagor Aglareb also known as the "Glorious Battle" was the battle at which Fingolfin's forces overran Morgoth's forces and forced them back to Angband. This ushered in the watchful peace and this battle led into a long campaign known as the Siege of Angband. Most likely Huan was part of this battle as he was given to Celegorm.
Community content is available under CC-BY-SA unless otherwise noted.