M. Aquinus - Legatus of Res Publica Romana from 43 BC to 42 BC
M. Aquinus was Legatus from 43-42 BC, and struck a number of issues jointly with C. Cassius Longinus in that respect. He and his gens is not otherwise known.

A legatus was a high ranking Roman military office in the Roman army, equivalent to a modern high ranking general officer. Initially used to delegate power, the term became formalized under Augustus as the officer in command of a legion.

From the times of the Roman Republic, legates had received large shares of the army's booty at the end of a successful campaign, which made the position a lucrative one, so it could often attract even distinguished consuls. The men who filled the office of legate were drawn from among the senatorial class of Rome. There were two main positions; the legatus legionis was an ex-praetor given command of one of Rome's elite legions, while the legatus pro praetore was an ex-consul, who was given the governorship of a Roman province with the magisterial powers of a praetor, which in some cases gave him command of four or more legions.
M. Aquinus
Legate M. Aquinus of the Roman Republic