That designation may mean " head of the (infantry) host " as opposed to his subordinate, the magister equitum, who was " head of the cavalry."
He was soon, however, recalled to Rome by Trajan, and appointed to the offices of decemvir stlitibus judicandis, praefectus feriarum Latinarum, and sevir turmae equitum Romanorum.
On returning to Rome he was nominated to the honorary office of sevir equitum romanorum, and was actively engaged as a pleader before the centumviri, the chancery court of Rome (vi.
Fabius Maximus Rullianus, his magister equitum, is well known.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.