There are sources saying many different things about when he was born but, all sources should that he was born in 570 AD, or as many others like to say the year of the Elephant.
When he is 40, or in 610, he claimed to have been visited inside of a cave by an angel named Gabriel. After being visited he preached in private for 3 years. Then in 613, he began to preach publicly.
In 622 Muslims flee Mecca for Medina, in September of 622 Muhammad arrives in Medina. There was conflict between three Jewish tribes and the Muslims. The tribe names were Bana Qaynuqa, Bana Nadir, and Bantu Qurayza.
In 625, the Meccans raise a larger army and defeat the Muslims at the battle and Mt. Uhud. Banu Nadir have been helping the Meccans and are expelled from Medina.