With his brother he rescued their mother Celebrían from an orc-hold and ever after rode against the orcs with the Rangers to avenge their mother’s torment.

During the War of the Ring, Elladan and Elrohir rode south with Halbarad, and accompanied Aragorn from Rohan to the Morannnon. They rode with him on the Paths of the Dead and at the Battle of the Pelennor Fields. They were also present at the Black Gate when the War of the Ring ended.

Because of their Elven-wisdom and the counsil they had received from their father before setting forth, Elladan and Elrohir were present at the councils of the Lords of the West, and may themselves have been numbered amoung the Lords.

Elladan and Elrohir chose not to accompany Elrond over Sea and stayed in Imladris well into the Fourth Age. Since they did not go over Sea they had chosen to become mortal.