Ballyshannon Victory
Archived: 23 October 2026
Abstract
In 1359 Cathal Óg Ó Conchobair defeated Cenél Conaill at Ballyshannon, capturing leading men and extending warfare into Tír Chonaill. The battle affected regional lordly networks across Connacht, Donegal and Breifne; the wounded claimant Matha Mag Samradháin later died. Ransom negotiations linked the victory to the transfer of Lebor na hUidre and Leabhar Gearr, demonstrating manuscripts’ political and learned value. In Desmond, Cormac Mac Carthaigh Mór died during a siege, succeeded by Domhnall Óg. Other deaths highlighted contested succession, while eminent judge Aed Mac Aedacáin’s death marked legal learning’s importance. James Butler became chief governor, reflecting Ireland’s divided political authority.