Some articles on karinz:

Battle Of River - Battle Preparation - Persian Preparation
... Persian army led by the officers commanding the wings Qubaz and Anushjan joined to Karinz's army, survivors from the Battle of Chains had informed commanding officers of how Persian veterans had ... Karinz panicked and chose to fight out of Uballa in a place called al Madhar, knowing the Persian veterans who had converted to Islam would not know the area ... Karinz chose this place because it was near the Euphrates River making it easier for the Persian regulars to arrive with ease ...