About Battle Of Callann
The Battle of Callann was fought in August 1261 between the Hiberno-Normans, under John FitzGerald, and three Gaelic clans: MacCarthy, who held the Kingdom of Desmond, and their kinsmen, the O'Sullivans, and the O'Donoghues under Fínghin Mac Carthaigh, King of Desmond, ancestor of the MacCarthy Reagh dynasty.