Titus Labienus, a Roman general, died in 45 B. C. He was tribune in 63, the year of Cicero's consulship, and carried some measures in the interest of Caesar, who in 58 took him as his lieutenant into Transalpine Gaul, and made him pro-praetor. He served with ability, and commanded the troops during Caesar's absence. In 54 he twice defeated the Treviri, and reduced them to submission. He took a distinguished part in the great campaign against Vercingetorix in 52, and thought himself not inferior in military ability to Caesar. On the outbreak of the civil war in 49 he went over to Pompey, but distinguished himself little, except for boastfulness and cruelty. He murdered the soldiers of Caesar who fell into his hands at Dyrrhachium. After the defeat at Pharsalia he fled, through Corcyra and Cyrene, to the remnant of Pompey's army in Africa. In 46 he commanded an army which was repulsed by Caesar near Ruspina, after which he served as lieutenant of Scipio. After the defeat at Thapsus he fled to Spain. In 45 he again fought against Caesar at Munda; his cautious attempt to cover his camp, being mistaken for a retreat, produced a panic, and turned the undecided battle into a rout, in which he fell.

He was an able lieutenant, but too vain and headstrong to command.