Battle of Firaz
The Battle of Firaz took place around January 634 between the Rashidun Caliphate and the combined armies of the Sasanian Empire and the Byzantine Empire. It ended with a Rashidun victory, concluding the first Arab invasion of Mesopotamia. Wikipedia
Start date: January 634 AD
Date: c. January 634
Result: Rashidun victory
Location: Iraq and Mesopotamia