Aulus Allienus was the name of two ancient Romans who lived roughly around the 1st century BC, and who may have been the same person:
Aulus Allienus was a politician and general of ancient Rome. He was a friend of Cicero's, who spoke of him in high terms.[1] He was the legate of Cicero's brother Quintus Tullius Cicero in the Roman province of Asia in 60 BC,[2] and praetor in 49.[3] In the following year, he had the province of Sicilia, and sent to Julius Caesar, who was then in the province of Africa, a large body of troops. He continued in Sicilia until 47, and received the title of proconsul. Two of Cicero's letters are addressed to him.[4][5] His name occurs on a coin, which has on one side C. CAES. IMP. COS. ITER., and on the other A. ALLIENVS PROCOS.
Aulus Allienus was a Roman politician who in 43 BC was sent by the general Publius Cornelius Dolabella to bring to him the legions which were in the Roman province of Egypt.[6] On his return from Egypt with four legions, he was surprised by Cassius Longinus in Palestine, who was at the head of eight legions. As he was outnumbered, Allienus joined Cassius.[7][8][9] This Allienus may be the same person as the one listed above.