Viriathus,

Chambers's Encyclopaedia, Volume 10: Swastika to Zyrianovsk and Index, p. 493

Viriathus, a Lusitanian herdsman, who became a guerilla leader against the Romans, escaped the treacherous massacre by the propraetor, Ser. Sulpicius Galba (151 B.C.), soon mustered a large force, and defeated army after army of the Romans. At length he hemmed in the consul, Q. Fabius Servilianus (141), in a defile, and forced him into unconditional surrender, on condition that the Lusitanian independence should be assailed no further. But next year Q. Servilius Cæpio treacherously resumed the war against Viriathus, and ended it by successfully bribing some of his officers to murder him.

Source scan(s): p. 0520