§ Of the Voyage of Eärendil and the War of Wrath The Silmarillion

But it availed him not. The Balrogs were destroyed, save some few that fled and hid themselves in caverns inaccessible at the roots of the earth; and the uncounted legions of the Orcs perished like straw in a great fire, or were swept like shrivelled leaves before a burning wind. Few remained to trouble the world for long years after. And such few as were left of the three houses of the Elf-friends, Fathers of Men, fought upon the part of the Valar; and they were avenged in those days for Baragund and Barahir, Galdor and Gundor, Huor and Húrin, and many others of their lords. But a great part of the sons of Men, whether of the people of Uldor or others new-come out of the east, marched with the Enemy; and the Elves do not forget it.