19. What changes did Muhammad make to Islam while in exile in Medina?

On September 24 the prophet Muhammad completes his Hegira, of fight from Mecca to Medina to escape persecution.in medium, media set about building the followers of his religion Islam into an organize community and Arabian power.The Hegira what is later mark the beginning (year1) of the Muslim calendar

Answergovernment control over all imports and exports;