|Battle of the Gwathló|
|Conflict: War of the Elves and Sauron|
|Date: SA 1700|
|Place: Tharbad in Eregion|
|Outcome: Decisive victory for Elves and Númenóreans over Sauron|
|Elves of Lindon and Numenorians||Forces of Sauron|
|~100,000 Numenorean infantry, ~10,000 Numenorean cavalry along with ~30,000 Elves and ~15,000 Dwarves of Durin||~200,000 Orcs and tens of thousands of other peoples who served Sauron|
|Light||Near-complete annihilation; Sauron himself barely escaped and, along with a bodyguard, were all that was left of his great host|
|War of the Elves and Sauron|
After being driven off to the south-east of Eriador after heavy losses at Sarn Ford, Sauron's forces regrouped and joined with his forces in Tharbad where they were assailed by the pursuing forces of Gil-galad, and then by a force of Númenóreans coming up through the Greyflood and attacking from their rear.
In the battle Sauron and his armies were utterly routed. The remaining survivors narrowly escaped but were assailed by Elrond just east of Calenardhon and destroyed, leaving Sauron with little more than a bodyguard to safely escape back into Mordor.
The ensuing victory left Sauron crippled but not defeated and being unconquered he slowly rebuilt himself throughout the ages until the thirty-third century, when he challenged Ar-Pharazôn for the over-lordship of Middle-earth.