David Livingstone's he spread the word of god and converted people to christianity
The Christians were people around the Roman Empire who were converted to Christianity by Christian missionaries and clergymen.
The Gregorian mission converted the people of Britain and Irelend to Christianity. The missionary sent was Augustine.
Legal proof? Well there are many many converts to Christianity in India from Hindus & Muslims. In fact all Indian Christians were Hindus first. It was the British Missionaries who converted many to Christianity. If you need more proof visit your local protestant church and ask them.
Wales and parts of northern England were originally converted to Christianity by missionaries from Ireland (about 550 onwards). These areas were in some respects out of step with Western Catholicism and their variety of Christianity is sometimes referred to as 'Celtic'. The south and east of England were converted by missionaries from mainland Europe. In 664 the 'Celtic' christians accepted alignment with Rome.
because missionaries came from other parts of Europe and converted them.
Christianity APEX
The Germanic peoples who invaded the Western Roman Empire were either already Arian Christians or converted to Roman Catholicism. Emperor Charlemagne conquered norther Germany and sent priests to covert the peoples there to Christianity. Missionaries travelled around the pagan parts of Europe to spread Christianity.
In the nineteenth century, Christian missionaries from Britain converted most of the Maori to Christianity. Britain gained control of New Zealand in its entirety in 1840.
King Ezana converted the Axumite Empire into Christianity.
Constantine, if he converted to Christianity at all, was a death bed convert. He never lived a Christian life and many scholars question the story of his becoming a Christian. The conversion of an emperor such as Constantine was a great propaganda tool for use by the early Christians. That much we know.
The Portuguese treated the natives either as enslaved labor or as subjects to be converted to Christianity and integrated into their colonial society. They imposed their culture, religion, and political systems on the indigenous populations, often leading to conflict and resistance.