The battle of Unnumbered Tears, Nirhaith Arnoidiad or just Unnumbered Tears was battle between Morgoth (Angband) and Union of Maedhros, (Elves of Hitlum,Falas, Narghotrond and Gondolin as well as Men of Dor-Lomin, Brethil and Dwarves).
War of the Jewels
Battle of Unnumbered Tears