Where did Sunni Islam begin to spread?

Sunni Islam began to spread in the Arabian Peninsula after the death of the Prophet Muhammad in 632 CE, as his followers expanded the faith through military conquests and trade. It quickly extended to regions such as the Levant, North Africa, and parts of the Persian Empire. Over the following centuries, Sunni Islam further spread into sub-Saharan Africa, Central Asia, and eventually Southeast Asia, becoming one of the world's major branches of Islam.