| Conflict: | Battle of Sarus |
| Partof: | the Byzantine–Sasanian War of 602–628 |
| Date: | April 625 |
| Place: | Sarus river, Cilicia (modern-day Turkey) |
| Result: | Byzantine victory |
| Combatant1: | Byzantine Empire |
| Combatant2: | Sassanid Empire |
| Commander1: | Heraclius |
| Commander2: | Shahrbaraz |
| Strength1: | unknown |
| Strength2: | unknown but possibly larger force |
| Casualties1: | unknown |
| Casualties2: | heavy |
The Battle of Sarus was fought in April 625 between the Byzantine army, led by Emperor Heraclius, and the Persian general Shahrbaraz. After a series of maneuvers, the Byzantine army under Heraclius, which in the previous year had invaded Persia, caught up with Shahrbaraz's army, which was heading towards the Byzantine capital, Constantinople, where his forces would take part in its siege together with the Avars. The battle ended in a nominal victory for the Byzantines, but Shahrbaraz withdrew in good order, and was able to continue his advance through Anatolia towards Constantinople.[1]
. James Howard-Johnston . East Rome, Sasanian Persia And the End of Antiquity: Historiographical And Historical Studies . 2006 . Ashgate Publishing . 0-86078-992-6 .
. A Short History of Byzantium. Vintage Books . 1997 . 0-679-77269-3. John Julius Norwich.