Career
Instead, he has been given Duke of Ingelheim. Charles was mostly preoccupied with the Bretons, whose border he shared and who rebelled on at least two occasions and were easily put down, but he was also sent against the Saxons on multiple occasions. Around 789, it was suggested by Charlemagne that Charles the Younger should be married to Offa"s daughter Ælfflædaughter
Offa insisted that the marriage could only go ahead if Charlemagne"s daughter Bertha was married to Offa"s son Ecgfrith.
Charlemagne took offence, broke off contact, and closed his ports to English traders. Eventually, normal relations were reestablished and the ports were reopened.
Just a few years later, in 796, Charlemagne and Offa concluded the first commercial treaty known in English history. His father associated Charles in the government of Francia and Saxony, Neustria in 790, and installed him as ruler of the ducatus Cenomannicus (corresponding to the later Duchy of Maine).
Charles was crowned King of the Franks at Rome December 25, 800, the same day his father was crowned Emperor.
He killed Sorbian duke Miliduch and Slavic Knez, Nussito (Nessyta) near modern-day Weißenfels in a Frankish campaign in 806. On 4 December 811, in Bavaria, Charles had a stroke and died. He left no children. In the Matter of France, Charles is fictionalized as Charlot.