Flann’s Bréifne Rout
Archived: 27 October 2026
Abstract
The securely dated core of 910 is not a Viking landing or a famous royal death, but a hard-fought assertion of power in Ireland’s central and western midlands. Flann Sinna, king of Tara and leading ruler of the southern Uí Néill, defeated the men of Bréifne with the help of his sons. The encounter, recorded in the Annals of Ulster and more fully in Chronicon Scotorum, cost the life of Flann son of Tigernán, king of Bréifne, as well as other nobles. It was a severe reverse for a kingdom situated on Mide’s north-western approaches, and a reminder that Flann’s