Wulfhere of Mercia, born in the year six hundred fifty, ascended to the throne as King of Mercia in six hundred fifty-eight. His reign marked a significant turning point in the history of southern England, as he became the first Christian king of all of Mercia. The details surrounding his conversion from Anglo-Saxon paganism remain unclear, yet his leadership was pivotal in ending the overlordship of Oswiu of Northumbria over the region.
Under Wulfhere's rule, Mercia expanded its influence considerably. He led successful campaigns against the West Saxons, securing control over much of the Thames valley. His military prowess was further demonstrated through the conquest of the Isle of Wight and the Meon valley, which he subsequently granted to King Æthelwealh of the South Saxons. His authority extended into Surrey, Essex, and Kent, solidifying his status as a formidable ruler.
Wulfhere's rise to power was not without its challenges. Following the death of his father, Penda, at the Battle of Winwaed in six hundred fifty-five, Wulfhere's brother Peada briefly held the throne under Northumbrian rule before his untimely murder. It was only through a revolt organized by Mercian nobles in six hundred fifty-eight that Wulfhere was able to reclaim the throne and drive out Oswiu's governors.
By the year six hundred seventy, Wulfhere had established himself as the most powerful king in southern England, effectively becoming the overlord of the region south of the Humber. However, his ambitions led him to challenge Oswiu's son, Ecgfrith of Northumbria, in six hundred seventy-four, a conflict that ultimately resulted in his defeat. Wulfhere's life came to an end, likely due to disease, in six hundred seventy-five, after which he was succeeded by his brother, Æthelred. His legacy is captured in the words of Stephen of Ripon, who described him as 'a man of proud mind, and insatiable will.'