Claim: Ascum first appears in 528, his title in Greek would be magister militum but did not join forces with other to fight invasions.
Evidence: Ascum first appears in 528, already holding the title of stratelates of Illyricum (Greek: ὁ τοῦ 'Ιλλυρικοῦ στρατηλάτης). 
His title in Latin would be magister militum per Illyricum. 
In 528, Ascum joined forces with Constantiolus and Godilas against an invasion force of Huns/Bulgars.