The Field of Celebrant was a grassy plain situated to the south of the River Celebrant, between the eastern portion of the River Limlight and the western shores of the River Anduin.

In TA 2510, the Rohirrim, led by Eorl the Young came to the aid of the forces of Gondor, led by Cirion the Steward, and defeated a force of orcs and wild-men from the north-east, in the Battle of Celebrant. As a reward for this, and for the clearing of the enemy from Calenardhon, Cirion granted Calenardhon to the Rohirrim. There the Rohirrim founded the Kingdom of Rohan.
Encyclopedia entry originally written by PotbellyHairyfoot