Despite the garrison being overwhelmed by the larger Byzantine army, they suffered only 150 casualties as they quickly retreated to the city, exactly what Belisarius had sought to avoid.
[1] After an assault of Sisauranon failed he sent troops to raid rich normally safe Persian territory across the Tigris.
[1] After procuring much wealth from the area the Byzantine raiding forces split up and went home as some were afraid Belisarius would take their loot.
[1] Belisarius wanted to return home too as to avoid being surprised by the arrival of Persian forces under Khosrow.
[1] Procopius later claimed this because of Belisarius wanting to confront his wife Antonina, whose lover his troops had imprisoned, as soon as possible about her affair.