§ Of the Fifth Battle: Nirnaeth Arnoediad The Silmarillion

Yet the oath of Fëanor and the evil deeds that it had wrought did injury to the design of Maedhros, and he had less aid than should have been. Orodreth would not march forth at the word of any son of Fëanor, because of the deeds of Celegorm and Curufin; and the Elves of Nargothrond trusted still to defend their hidden stronghold by secrecy and stealth. Thence came only a small company, following Gwindor son of Guilin, a very valiant prince; and against the will of Orodreth he went to the northern war, because he grieved for the loss of Gelmir his brother in the Dagor Bragollach. They took the badge of the house of Fingolfin, and marched beneath the banners of Fingon; and they came never back, save one.