Sláine’s Drowned Foreigners
Archived: 27 October 2026
Abstract
In 947, Ruaidrí ua Canannáin of Cenél Conaill defeated Congalach of Brega and Dublin's Amlaíb Cuarán at Sláine near the Boyne, killing or drowning many Dublin warriors. The encounter formed part of competing claims to Tara, not a national war, and highlighted Dublin's role in Irish politics. Elsewhere, Osraige routed Leinster, killing King Braen and other leaders, while northern nobles also died in obscure conflict. Cenél nÉogain made a notable silver gift to Armagh, affirming political and religious ties. Annals recorded ecclesiastical deaths, a travelling preacher, and marvels, revealing intertwined warfare, patronage, Christianity, and Irish Sea connections during the year.