796 CE

King Æthelred I of Northumbria is murdered, probably at Corbridge, by his ealdormen, Ealdred and Wada. Another rival, Torhtmund, slays Ealdred in revenge. Northumbria is plunged into chaos. The patrician Osbald is placed on the throne, but is deserted by his supporters after only 27 days. He flees from Lindisfarne to Pictland. Another faction brings back Æthelred I's old back-from-the-dead rival, Eardwulf, as the new king. He dismisses his wife and publicly takes a concubine. Eardwulf is alienated from Archbishop Eanbald of York. King Charlemagne organizes an invasion of the Avar Khaganate, with one army under his son Pepin of Italy and another army under one of his vassals, the Croat Duke Vojnomir. The two armies launch a successful two-pronged invasion of the Avar Khaganate (modern Hungary). They seize the Avar "ring" (the nomadic tent capital), destroying Avar power before returning with so much booty in gold and jewels that 15 wagons, each drawn by four oxen, are needed to bring it back to Frankish territory. Charlemagne wins a major victory (in which the Lower Pannonian duke Vojnomir aids him), and the Franks make themselves overlords over the Croatians of northern Dalmatia, Slavonia, and Pannonia. Frankish missionaries are sent to the area to convert the pagan population to Christianity. King Offa of Mercia and Charlemagne seal a trading agreement, and a marriage alliance is proposed. However, Offa dies after a 39-year reign, that has incorporated Kent, Essex, Sussex, and East Anglia into the Mercian realm. Offa is buried at Bedford, and succeeded for a short time by his son Ecgfrith, and then a distant cousin, Coenwulf.

In the 790s, the 8th century.