Penda, after gathering allies from
East Anglia and
Wales, marched with a force led by "thirty warlords". Oswiu, who was Oswald's brother but had succeeded him only in Bernicia, the northern part of Northumbria, was besieged by Penda's forces at a place called
Urbs Iudeu (which has been identified, perhaps dubiously, with
Stirling) in the north of his kingdom.
Iedeu appears as a historic name for
Jedburgh, also located in the north of the kingdom. Apparently Oswiu was desperate enough to offer a great deal of treasure to Penda in exchange for peace. Although the sources are unclear, it is likely that some sort of agreement was reached at
Iudeu: although
Bede says that Oswiu's offers of treasure were rejected by Penda, who, Bede says, was determined to destroy Oswiu's people "from the highest to the lowest", he does mention that Oswiu's young son
Ecgfrith was being held hostage by the Mercians, perhaps as part of a deal. The
Historia Brittonum contradicts Bede regarding the treasure, saying that Penda distributed it among his British allies, which would presumably mean that he accepted it. The recorded events may be interpreted to mean that Penda and his army then began marching home, but for some reason the two armies met and fought at a place called the River
Winwaed. Breeze argues that Penda and his army would have been in a difficult strategic location along the Went during their withdrawal, giving Oswiu a good opportunity to attack. along with his army, and Bede says that
Aethelwald of Deira withdrew from the battle to await the outcome from a place of safety. Penda was soundly defeated, and both he and his ally, the East Anglian King
Aethelhere, were killed, with thirty allied leaders of warbands (
duces regii). The battle was fought by the river in the midst of heavy rains, and Bede says that "many more were drowned in the flight than destroyed by the sword". Bede mentions that Penda's head was cut off. Writing in the 12th century,
Henry of Huntingdon expanded his version of Bede's text to include supernatural intervention and remarked that Penda, in dying violently on the battlefield, was suffering the same fate he had inflicted on others during his aggressive reign. ==Aftermath==