Charles, King of the Franks, having made…

Charles, King of the Franks, having made the Bavarian ducal residence of Ratisbon (Regensburg) his base, conducts several campaigns, partly under his own command, against the Avar kingdom (in modern Hungary and Upper Austria), who have dominated the middle basin of the Danube River throughout most of the seventh and eighth centuries.

From 791, the Franks war against the Avars, who control the central Danube River valley and have over the past centuries acquired a vast hoard of gold and silver plundered or extorted largely from Constantinople's holdings.