Muhammad was a prophet in Islam.
Muhammad was an important part of the Islam religion. His revelations formed the basis of Islam.
After this, lots of disagreement took place over leadership. This lead to Islam dividing into two divisions, Sunni and Shi’a.
After the Muslims invaded Spain, they were defeated at the Battle of Tours.
After this battle, the Muslims could no longer expand.
After this takes place, Baghdad falls. This is important because Baghdad was the capital. Once the capital falls, the rest of an empire weakens.