Brutus then fortifies Vissaium (modern Viseu), crosses the Douro River, and pushes further north to reach the Lima River.

According to Strabo, Brutus ultimately reaches the Minho River, extending Roman control deep into Gallaeci territory.

That same year, the Gallaeci, reportedly sixty thousand strong (as recorded by Paulus Orosius), confront the Roman legions at the Douro River. The ensuing battle results in a decisive Roman victory, after which Brutus returns to Rome as a celebrated hero. In recognition of his conquest, he is granted the agnomen Gallaicus, meaning "conqueror of the Gallaeci."