Battle of 839

The Battle of 839—sometimes called the Disaster of 839 or the Picts’ Last Stand—was a clash between Vikings and a combined Pictish and Gaelic force. The Vikings won decisively, killing Uuen, the Pictish king; his brother Bran; and Aed son of Boanta, the king of Dál Riata. These deaths cleared the way for Kenneth I to rise, leading to the creation of the Kingdom of Scotland and the eventual loss of a distinct Pictish identity. Historians have called it “one of the most decisive and important battles in British history.” Viking raids on Britain began in the late 700s. In 793, the monastery at Lindisfarne was plundered. Iona Abbey suffered repeated attacks: the Annals of Ulster record that in 802 “Iona was burned by the heathens,” in 806 “the community of Iona, to the number of sixty-eight, was killed by the heathens,” and in 825 the monk Blathmac was murdered during a raid. At that time, Pictland and Dál Riata were the two main powers in northern Britain. Yet despite these coastal raids, no recorded battles between those kingdoms and the Vikings occurred until 839. Almost nothing is known about the fighting itself. The only contemporary source is the Annals of Ulster, which under the year 839 states: “The heathens won a battle over the men of Fortriu and Uuen son of Onuist and Bran son of Onuist and Aed son of Boanta and others almost innumerable fell there.” The mention of Aed alongside “almost innumerable others” suggests a large engagement, likely the climax of a campaign that gave Uuen time to assemble a substantial force. Aed’s presence fighting with the men of Fortriu also implies he had sworn allegiance to Uuen, meaning Dál Riata was under Pictish control. Where the battle took place is unknown. The Annals of Ulster give no location, but it probably occurred within Fortriu—the core of Pictland, likely centered on Moray and Easter Ross—and near the sea. A possible site is along the shores of the Moray Firth. Uuen was the last king of the house of Fergus, which had ruled Pictland for at least 50 years. His crushing defeat by the Vikings threw northern Britain into instability. Kenneth I emerged from this chaos. Later sources offer some details about the years that followed.