Oriel Siege
Archived: 22 October 2026
In 1365, Niall Ó Néill, newly king of Tír Eógain, led a coalition into Oriel, besieging Brian Mac Mathghamhna before an unauthorised assault shattered the settlement and killed allies. Dynastic contention also reshaped Connacht, Magh Luirg and East Bréifne, where deaths, accessions, warfare and Cú Chonnacht Ó Raghallaigh’s religious retirement altered lordship. Raids on border communities demonstrated the human cost of rivalry. Ecclesiastical leaders and learned travellers remained active across Irish Sea networks. In the English lordship, Lionel of Antwerp briefly returned England, while Thomond’s rulers submitted diplomatically. The year reveals authority as negotiated through warfare, kinship, religion and accommodation.