Events

• 11 May - Battle of Dysert O'Dea
  Battle of Dysert O'Dea
  The Battle of Dysert O'Dea took place on 10 May 1318 at Dysert O'Dea near Corofin, Ireland. It was part of the Bruce campaign in Ireland. The Norman Richard de Clare attacked the Gaelic Irish chieftain Conchobhar Ó Deághaidh, chief of the Cineal Fearmaic and ally of Muirchertach Ó Briain, but he...
  
  : Richard de Clare defeated and killed by Conor O'Dea in alliance with O'Briens, MacNamaras, and Ó hEithirs..
• 29 September - Alexander de Bicknor
  Alexander de Bicknor
  Alexander de Bicknor was an official in the Plantagenet kingdom under Edward I of England, Edward II of England, and Edward III of England...
  
   arrives in Ireland.
• 14 October - Battle of Faughart
  Battle of Faughart
  The Battle of Faughart was fought on 14 October 1318 between a Hiberno-Norman force led by John de Bermingham and Edmund Butler, and a Scots-Irish army commanded by Edward Bruce, brother of Robert Bruce, king of Scotland. It was a battle of the First War of Scottish Independence and more precisely...
  
  : Edward Bruce
  Edward Bruce
  Edward the Bruce , sometimes modernised Edward of Bruce, was a younger brother of King Robert I of Scotland, who supported his brother in the struggle for the crown of Scotland, then pursued his own claim in Ireland. He was proclaimed High King of Ireland, but was eventually defeated and killed in...
  
   defeated and killed .
• Beginning of the Kildare Supremacy.

Deaths

• 11 May - Richard de Clare, Thomas de Lees, Henry de Capella, James de Caunteton, John de Caunteton, all killed at Dysart O'Dea.
• Gilbert de Roache "killed at Ross by the burgesses of Ross."