What they offered, in short, was connection to the wider, prestigious, prosperous world of Islam. Islamization extended modestly even to the Americas, particularly in Brazil, where Muslims led a number of slave revolts in the early nineteenth century.
Began with slaves brought over from the west coast of Africa in regards to Brazil. Islam was spread by traders, merchants, and through warfare just as Christianity was. After muhammeds death, armies conquered areas in the Byzantine and Sassanid empires.