"The Siege Of Angband"
Painting by John Howe
In the front of that fire cam Glaurung
the golden, father
of the dragons, in his full might; and in his train were
Balrogs, and behind them came the black
armies of the Orcs in
multitudes such as the Noldor had never
before seen or
imagined. And they assaulted fortresses of the Noldor, and
broke the leaguer about Angband, and slew
wherever they found
them the Noldor and their allies, Grey-elves
and Men...
Thus ended the Siege of Angband...
The Silmarillion