Miliduch was a knyaz

Knyaz

Kniaz, knyaz or knez is a Slavic title found in most Slavic languages, denoting a royal nobility rank. It is usually translated into English as either Prince or less commonly as Duke....

 of the Lusatian Serbs (Sorbs)

Sorbs

Sorbs are a Western Slavic people of Central Europe living predominantly in Lusatia, a region on the territory of Germany and Poland. In Germany they live in the states of Brandenburg and Saxony. They speak the Sorbian languages - closely related to Polish and Czech - officially recognized and...

. Formerly allied to Charlemagne

Charlemagne

Charlemagne was King of the Franks from 768 and Emperor of the Romans from 800 to his death in 814. He expanded the Frankish kingdom into an empire that incorporated much of Western and Central Europe. During his reign, he conquered Italy and was crowned by Pope Leo III on 25 December 800...

, the Sorbs ended their vassalage to the Franks

Franks

The Franks were a confederation of Germanic tribes first attested in the third century AD as living north and east of the Lower Rhine River. From the third to fifth centuries some Franks raided Roman territory while other Franks joined the Roman troops in Gaul. Only the Salian Franks formed a...

 and rebelled, invading Austrasia

Austrasia

Austrasia formed the northeastern portion of the Kingdom of the Merovingian Franks, comprising parts of the territory of present-day eastern France, western Germany, Belgium, Luxembourg and the Netherlands. Metz served as its capital, although some Austrasian kings ruled from Rheims, Trier, and...

. Charles the Younger launched a campaign against the Slavs in Bohemia

Bohemia

Bohemia is a historical region in central Europe, occupying the western two-thirds of the traditional Czech Lands. It is located in the contemporary Czech Republic with its capital in Prague...

 in 805, and after killing Duke Lecho of the Bohemians, Charles himself crossed the Saale

Saale

The Saale, also known as the Saxon Saale and Thuringian Saale , is a river in Germany and a left-bank tributary of the Elbe. It is not to be confused with the smaller Franconian Saale, a right-bank tributary of the Main, or the Saale in Lower Saxony, a tributary of the Leine.-Course:The Saale...

 with his army and killed Miliduch and knyaz Nussito (Nessyta), near modern-day Weißenfels

Weißenfels

Weißenfels is the largest town of the Burgenlandkreis district, in southern Saxony-Anhalt, Germany. It is situated on the river Saale, approximately south of Halle.-History:...

, in 806

806

Year 806 was a common year starting on Thursday of the Julian calendar.- Asia :* Emperor Heizei succeeds Emperor Kammu as Emperor of Japan....

. The region was laid to waste, upon which the other Slavic chieftains submitted and gave hostages.