Lusitanic definitions of "Lusitanic" or "Lusitanian" may include medieval-to-modern Galicia, because the Portuguese people and Galician people share close linguistic and cultural ties, including pre-Roman Celtic ones. Modern Portuguese and the Galician language both derive from medieval Galician-Portuguese, and the term is a cultural classification more than a historic–geographical definition. Although, in Ancient Roman times, the Gallaeci were not part of Lusitania province, what became the Galician-Portuguese language developed from Vulgar Latin in Gallaecia, which comprised what is now Galicia, as well as north Portugal, the center of the development of post-Roman Portuguese culture. Later Portuguese use of the name "Lusitania"
Roman conquest of the Iberian peninsula as being even more greedy than Lucullus. He killed many Lusitanians by treachery. Lusitania was probably the area of the peninsula that resisted the Roman invasion for the longest time. Until the year 155 BC, the Lusitanian chief Punicus made raids into the part of Lusitania controlled by Rome, ending with the twenty-year peace made by the former praetor Sempronius Gracchus. Punicus obtained an important victory against the praetors Manilius and Calpurnius, inflicting 6,000 casualties. After the death of Punicus, Caisaros took charge of the fight against Rome, vanquishing the Roman troops again in 153 BC, revealing his banner in