The peace was shattered by the ascent of Mercian power; the chronicler Simeon of Durham records the defeat of the "gens Hestingorum" (the people of Hastings) by Offa of Mercia in 771. Mercian overlordship was ended when they were defeated in 825, by Egbert of Wessex, at the Battle of Ellandun. Egbert went on to annex the territories of Essex, Kent, Surrey and Sussex, suggesting that by this time the Haestingas had been subsumed into Sussex. However it is known that the Haestingas retained a distinct identity till the 11th century as the "Anglo-Saxon Chronicle" records the Haestingas as having been harried by the Danes in 1011.