Musokios[A] was a 6th-century Sclaveni rex that ruled around 593, during Maurice's Balkan campaigns, mentioned by Theophylact Simocatta.
[3][2][4] Ardagast, a commander of Musokios, was sent and raided Thrace, which prompted Emperor Maurice to deal with the Sclaveni - sending an army with commander-in-chief Priscus and infantry commander Gentzon to cross the Danube at Dorostolon (present-day Silistra) and surprise attack the Slavs in their own territory (as the Slavs had long been pillaging the Byzantine Empire).
In 593 the Army arrived at the Slavic camp at midnight, surprising the Slavs who fled in confusion, Ardagast fell on a tree stump and was almost captured, but luckily he was near a river and eluded the caption.
The Gepid gave the signal and the Slav colony was slaughtered, with the boats taken into Byzantine possession and filled with 300 soldiers heading towards Musokios.
Some Slavs escaped and managed to destroy a good part of the army led by Gentzon, as a result, Priscus hanged the negligent guards.