Complex sentence: This Eusebius is identified elsewhere as a former Magister Equitum and Magister Peditum, which means he had served as a military commander of both the cavalry and infantry of the Roman army.
Split into simpler sentences: This Eusebius is identified elsewhere as a former Magister Equitum and Magister Peditum. Which means he had served as a military commander of both the cavalry and infantry of the Roman army.