I'm sure the whole no-Islam horse has been beaten to death, but I couldn't find anything like this scenario. The POD centers around Khalid ibn al-Walid. He was the military genius who led the Muslim armies to unite Arabia and conquer Iraq, Levant, Syria, and Eastern Anatolia, defeating the Byzatines and Sassanids in tens of battles. He was without a doubt one of the keys to the Muslims' great conquests.
At the Battle of Chains, which was the first battle during the Muslim invasion of Persia, the Sassanid general Hormoz challenged Khalid to a duel before the battle. In OTL, Khalid killed Hormoz and destroyed his demoralized army. What if Hormoz killed Khalid in the duel? Would it have any lasting effect on the future of the Caliphate, or was it already set in stone that the crippled Byzantines and Sassanids were doomed to the Muslim tide?
At the Battle of Chains, which was the first battle during the Muslim invasion of Persia, the Sassanid general Hormoz challenged Khalid to a duel before the battle. In OTL, Khalid killed Hormoz and destroyed his demoralized army. What if Hormoz killed Khalid in the duel? Would it have any lasting effect on the future of the Caliphate, or was it already set in stone that the crippled Byzantines and Sassanids were doomed to the Muslim tide?