Decimus Junius Brutus pacified Lusitania and southern Gallaecia. The way the Roman kept suzerainty over the peoples of this area is unclear due lack of information. It is likely that they were forced to become Roman allies like some of the Celtiberian peoples who lived further east. There were further conflicts between the Romans and the Lusitanians later. Lusitania and Gallaecia were annexed into the Roman Empire later, when Augustus reorganised the Roman provinces of Hispania either before or after the Cantabrian Wars of 29–19 BC (in Asturias and Cantabria, to the north of Gallaecia) in which he suppressed the last rebellion against the Romans in the peninsula. Lusitania was established as a new province. Gallaecia became part of Hispania Tarraconensis, a new and larger province which replaced the province of Hispania Citerior to include central and southern Spain.