15 April

Events that occurred on 15 April.
== In Arda ==
* T.A. 2510:
** Battle of the Field of Celebrant:
*** The Balchoth and a great host of Orcs attack the inferior host of Gondor on the Field of Celebrant.
*** All seems lost for Gondor until the Éothéod under leadership of Eorl come to its aid.
*** Death of Borondir Udalraph.
*** Together with the Éothéod Gondor is victorious and Cirion, steward of Gondor, gives Calenardhon to Eorl which becomes the later Rohan.