Hampshire tribes of northeastern Gaul - whether these two events are linked to the decline of hillforts is unknown. By the Roman conquest, the "oppidum" at Venta Belgarum, modern-day Winchester, was the "de facto" regional administrative centre; Winchester was, however, of secondary importance to the Roman-style town of Calleva Atrebatum, modern Silchester, built further north by a dominant Belgic polity known as the Atrebates in the 50s BCE. Julius Caesar invaded southeastern England briefly in 55 and again in 54 BCE, but he never reached Hampshire. Notable sites from this period include Hengistbury Head (now in Dorset), which was a major
New England town early in the 19th century. By 1850, the only New England state that still had large unincorporated areas was Maine; by the end of the 19th century, most areas in Maine that could realistically be settled had been organized into towns. Early town organization in Vermont and much of New Hampshire proceeded in a somewhat different manner from that of the other New England states. In these areas, towns were often "chartered" long before any settlers moved into a particular area. This was very common in the mid to late 18th century—although there were towns which predated that period and