According to the Three Fragments, in 918 Æthelflæd led an army of Scots and Northumbrian English against forces led by the Norse Viking leader Ragnall at the Battle of Corbridge in Northumbria.
Menurut Tiga Fragmen, pada 918 Æthelflæd memimpin tentara berbangsa Skotlandia dan Inggris Northumbria melawan pasukan Viking Norwegia yang dipimpin Ragnall ua Ímair dalam pertempuran Corbridge di Northumbria.