Analysis of information sources in references of the Wikipedia article "Səfəvilərin əhalini şiələşdirməsi" in Azerbaijani language version.
Early on, the Sunni Ak Koyunlu had Amed (Diyarbakir) as their capital, while the Shia Kara Koyunlu had their center northeast of Lake Van.
“The mass of the Oghuz Turkic tribes who crossed the Amu Darya towards the west left the Iranian plateau, which remained Persian, and established themselves more to the west, in Anatolia. Here they divided into Ottomans, who were Sunni and settled, and Turkmens, who were nomads and in part Shiite (or, rather, Alevi). The latter were to keep the name “Turkmen”for a long time: from the 13th century onwards they “Turkised”the Iranian populations of Azerbaijan (who spoke west Iranian languages such as Tat, which is still found in residual forms), thus creating a new identity based on Shiism and the use of Turkish. These are the people today known as Azeris.”
This unique aspect of Azerbaijan, the only area to have been almost entirely “Turkicized” within Iranian territory, is the result of a complex, progressive cultural and historical process, in which factors accumulated successively (Sümer; Planhol, 1995, pp. 510-12) The process merits deeper analysis of the extent to which it illustrates the great resilience of the land of Iran. The first phase was the amassing of nomads, initially at the time of the Turkish invasions, following the route of penetration along the piedmont south of the Alborz, facing the Byzantine borders, then those of the Greek empire of Trebizond and Christian Georgia. The Mongol invasion in the 13th century led to an extensive renewal of tribal stock, and the Turkic groups of the region during this period had not yet become stable. In the 15th century, the assimilation of the indigenous Iranian population was far from being completed. The decisive episode, at the beginning of the 16th century, was the adoption of Shiʿite Islam as the religion of the state by the Iran of the Safavids, whereas the Ottoman empire remained faithful to Sunnite orthodoxy. Shiʿite propaganda spread among the nomadic Turkoman tribes of Anatolia, far from urban centers of orthodoxy. These Shiʿite nomads returned en masse along their migratory route back to Safavid Iran. This movement was to extend up to southwest Anatolia, from where the Tekelu, originally from the Lycian peninsula, returned to Iran with 15,000 camels. These nomads returning from Ottoman territory naturally settled en masse in regions near the border, and it was from this period that the definitive “Turkicization” of Azerbaijan dates, along with the establishment of the present-day Azeri-Persian linguistic border—not far from Qazvin, only some 150 kilometers from Tehran.
This unique aspect of Azerbaijan, the only area to have been almost entirely “Turkicized” within Iranian territory, is the result of a complex, progressive cultural and historical process, in which factors accumulated successively (Sümer; Planhol, 1995, pp. 510-12) The process merits deeper analysis of the extent to which it illustrates the great resilience of the land of Iran. The first phase was the amassing of nomads, initially at the time of the Turkish invasions, following the route of penetration along the piedmont south of the Alborz, facing the Byzantine borders, then those of the Greek empire of Trebizond and Christian Georgia. The Mongol invasion in the 13th century led to an extensive renewal of tribal stock, and the Turkic groups of the region during this period had not yet become stable. In the 15th century, the assimilation of the indigenous Iranian population was far from being completed. The decisive episode, at the beginning of the 16th century, was the adoption of Shiʿite Islam as the religion of the state by the Iran of the Safavids, whereas the Ottoman empire remained faithful to Sunnite orthodoxy. Shiʿite propaganda spread among the nomadic Turkoman tribes of Anatolia, far from urban centers of orthodoxy. These Shiʿite nomads returned en masse along their migratory route back to Safavid Iran. This movement was to extend up to southwest Anatolia, from where the Tekelu, originally from the Lycian peninsula, returned to Iran with 15,000 camels. These nomads returning from Ottoman territory naturally settled en masse in regions near the border, and it was from this period that the definitive “Turkicization” of Azerbaijan dates, along with the establishment of the present-day Azeri-Persian linguistic border—not far from Qazvin, only some 150 kilometers from Tehran.
