Kingdom of Desmond
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. It took place in the townland of Callann or Collon near modern-day Kilgarvan, County Kerry. MacCarthaigh was victorious.