Viriathus, a Lusitanian warrior, assassinated in 140 B. C. He was one of those who escaped the slaughter of the Lusitanians in 150 by Servius Sulpicius Galba. In 147 he was chosen general by the Lusitanians, who continued the conflict against the Romans. After extricating his troops from a fortress in which they had been shut up by Vetilius, he drew the forces of the latter into an ambuscade, and defeated them. In the following years he ravaged the Roman territories, and successively defeated the troops sent against him; but in 144 he was routed by Q. Fabius Aemilianus, and again in 143 by Q. Pompeius, whom however he shortly afterward signally vanquished. In 142 the consul Q. Fabius Servilianus gained great advantages over him, and took many of his cities, but Viriathus finally surrounded him in a mountain pass and captured him with his entire army. He concluded a treaty with the Romans by which the Lusitanians were guaranteed the peaceable possession of their own country and were recognized as allies of Rome. This treaty was broken the next year, with the connivance of the Roman senate, by the consul Q. Servilius Csepio, who invaded Lusitania, and bribed three envoys of Viriathus, sent to negotiate for peace, to murder him.