The Battle of Lough Raska () or Battle of Corcomroe () took place on 15 August 1317 near Corcomroe Abbey in north County Clare, Ireland. It was part of a fight for control of the UÃÂ Briain chieftaincy and part of the Anglo-Norman wars in Ireland. Forces loyal to Muircheartach ÃÂ Briain were commanded by Diarmait ÃÂ Briain in a pitched battle against Donnchadh ÃÂ Briain, who was an ally of Mathghamhain ÃÂ Briain and Richard de Clare. Both armies were about 9,000 men each. Diarmait ÃÂ Briain's forces were victorious. This would be a precursor to the Battle of Dysert O'Dea.