I stand corrected. Seems like the Turkish presence will if anything be stronger without the competing Arab influence.Yeah, from what I recall Southern Mesopotamia, particularly centered around Basra, is the current Turkish homeland, with Northern Mesopotamia mostly populated by Kurds, Turkopoles, and Arabs with Central Mesopotamia where the Arab population is largely located. In fact this war could greatly reduce what influence Arabs still have in the Ottoman Empire with the loss of the Levant and Northern Mesopotamia and the destruction of Central Mesopotamia. I see some enterprising Turks in Basra taking advantage of the destruction to gain more control of Central Mesopotamia and drag the political and economic weight farther south to Basra and Kuwait.
Beyond that Iskander will likely see that he needs to more unify his people so that this cultural split between the two economic and demographic centers of his empire doesn't happen again, so long as the Persian Plateau and Central and Southern Mesopotamia are united the Ottoman Empire will have the strength to retake the periphery in Central Asia and the Hindu Kush and push into India.