Aulas Hirtius, a Roman statesman, born about 90 B. C, fell in battle near Mutina (Mo-dena) in 43. He was a friend of Julius Caesar, under whom he served as legate in Gaul (58), and one of the 10 praetors nominated by him for the year 46. During Caesar's absence in Africa he lived principally at his Tusculan es-tate, which was contiguous to the villa of Cicero, who was his personal friend, although opposed to him in politics. In 44 he received Belgic Gaul as his province, but governed it through a deputy, remaining in the capital in continued intimacy with Caesar, who nominated him, together with Vibius Pansa, as consul for the next year. After Caesar's assassination he retired to the country. Though not fully recovered from a dangerous illness, and politically undecided, he entered upon his duties as consul, Jan. 1, 43. He finally declared against Antony, and was sent at the head of an army to join Octavius, and relieve Decius Brutus, then besieged by Antony in Mutina. He fell while leading his victorious troops to an assault.

He has been supposed to have written the eighth book of Caesar's Commentaries on the Gallic war, and the histories of his Alexandrian and African campaigns; but the authorship of all these is also claimed for Oppius.