635–636 CE siege of Byzantine Syrian city by the Rashidun Caliphate
Siege of Emesa
The siege of Emesa was laid by the forces of the Rashidun Caliphate from December 635 up until March 636.
This led to the Islamic conquest of Emesa, which was a major trading city of the Byzantine Empire in the Levant.
Text adapted from Wikipedia, CC BY-SA 4.0.