Historians usually score Chaldiran as a victory for the Ottomans, but overall it was more of a draw, because Selim could not hold Tabrez. With winter coming, he fell back to more secure bases deeper inside Anatolia, and by the following year the Persians had reoccupied Tabrez and inoculated it with a scorched-earth campaign that left nothing for invaders to feed on if they wanted to attack again. So the battle of Chaldiran actually ended up defining the frontier between the Ottoman and Safavid realms, which hardened eventually into the border between the successor states, Iran and Turkey, and
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