Appian (who wrongly identified Decimus Junius Brutus Callaicus as a praetor called Sextius Junius Brutus) wrote that (in 138 BC) Brutus was sent to the Roman province of Hispania Ulterior (Further Spain, in modern Andalusia in the south) to deal with many guerrilla bands which were raiding Lusitania in emulation of Viriathus, the Lusitanian chieftain who led the Lusitanian War (or Fiery War, 155–139 BC) against the Romans and who had been assassinated the year before. The guerrilla bands raided Lusitania, which was between the Rivers Durius (Douro) and Tagus, laying to the north-west of Hispania Ulterior. It covered central and northern parts of present Portugal and also some territory in current western Spain.