[Mithalwen]

Also, it should be remembered that there were no longer enough high elves to make up much more than a small (although extremely high quality) force such as when Glorfindel made his prophecy about the Witch King having come to the aid of Earnur (?). In the lettes Tolkien makes it clear in the letters that there are few of them left, most having passed over sea after the collapse of Lindon as a realm following the death of Gilgalad. Rivendell is a large household not a kingdom.

The Silvan elves were also diminished - Thranduil lost two thirds of his army and therefore adult male population in Mordor and would have lostt more in the battle opf the 5 Armies.