this. Irish Travellers Irish Travellers are an ethnic people of Ireland. A DNA study found they originally descended from the general Irish population, however, they are now very distinct from it. The emergence of Travellers as a distinct group occurred long before the Great Famine, a genetic analysis shows. The research suggests that Traveller origins may in fact date as far back as 420 years to 1597. The Plantation of Ulster began around that time, with native Irish displaced from the land, perhaps to form a nomadic population. History Early expansion and the coming of Christianity One Roman historian records that the Irish people were divided into "sixteen different nations" or tribes. Traditional histories assert that the Romans never attempted to conquer Ireland, although it may have been considered. The Irish were not, however, cut off from Europe; they frequently raided the Roman territories, and also maintained trade links. Among the most famous people of ancient Irish history are the High Kings of Ireland, such as Cormac mac Airt and Niall of the Nine Hostages, and the semi-legendary Fianna. The 20th-century writer Seumas MacManus wrote that even if the Fianna and the Fenian Cycle were purely fictional, they would still be representative of the character of the Irish people: The introduction of Christianity to the Irish people during the 5th century brought a radical change to the Irish people's foreign relations. The only military raid abroad recorded after that century is a presumed invasion of Wales, which according to a Welsh manuscript may have taken place around the 7th century. In the words of Seumas MacManus: Following the conversion of the Irish to Christianity, Irish secular laws and social institutions remained in place. Migration and invasion in the Middle Ages The 'traditional' view is that, in the 4th or 5th century, Goidelic language and Gaelic culture was brought to Scotland by settlers from Ireland, who founded the Gaelic kingdom of Dál Riata on Scotland's west coast. This is based mostly on medieval writings from the 9th and 10th centuries. The archaeologist Ewan Campbell argues against this view, saying that there is no archaeological or placename evidence for a migration or a takeover by a small group of elites. He states that "the Irish migration hypothesis seems to be a classic case of long-held historical beliefs influencing not only the interpretation of documentary sources themselves but the subsequent invasion paradigm being