And it didn't matter that Muhammad himself was born into the Quraysh tribe because he wouldn't shut up about how there was only one god, which was really bad news to the Quraysh tribe because they managed the pilgrimage trade in Mecca, and if all those gods were false, it would be a disaster economically. Although come to think of it, in the end, the Meccan pilgrimage business turned out just fine. So the Quraysh forced Muhammad and his followers out of Mecca in 622 CE, and they headed to Yathrab, also known as Medina. This journey, also known as the Hijrah, is so important that it marks year zero in the Islamic calendar. In Medina, Muhammad severed the religion's ties to Judaism, turning the focus of prayer away from Jerusalem to Mecca. Also in Medina, the Islamic community started to look a lot more like a small empire than like a church. Like, Jesus never had a country to run, but Muhammad did almost from the beginning, and in addition to being an important prophet, he was a good general.