Battle of Nakhchivan (1406)

The battle between the belligerents was fought on the bank of Aras River on October 14, 1406 (1 Jumada al-awwal 809).^[4] Qara Yusuf side emerged victorious. The demoralised Abu Bakr's troops retreated and on their way back, they pillaged the city of Tabriz.^{[3][better source needed]} This enraged notable Tabrizi which then invited Qara Yusuf to their city. Meanwhile, Abu Bakr's side continued their retreat to Sultania and passed their time there during the winter.

As Abu Bakr's side was in Sultania, Tabriz fell into the grip of Qara Yusuf. The fall of Tabriz marked Qara Yusuf's as the undisputed master of Azerbaijan.^{[3][better source needed]} In Tabriz, Qara Yusuf attracted some support against the rule of Timurid Empire, one of the supporter was Sultan Mu'tasim.^[4] After consolidating power, Qara Yusuf led the army to march into Sultania where forcefully captured and transferred Sultania's inhabitants to Tabriz, Maragha, and Erbil.^{[3][better source needed]} On 21 April 1408 (24 Dhu al-Qadah 810), Abu Bakr was planning to launch a surprise attack towards Kara Koyunlu, but Qara Yusuf moved more quickly, then decisively defeated Abu Bakr forces in the Battle of Sardrud.^[4]

Qara Yusuf became a powerful ruler in the region and established his stronghold immediately by making alliances with other Turkmen tribes, such as with Bistam Jagir.^[5] He occupied Soltaniyeh, Ardabil, and Maragheh; and moved the population to Tabriz. This would allow Qara Yusuf to face a counterattack in 1408 by the Timurids who intended on retaking Azerbaijan but would be disappointed as they were defeated decisively.^[6] The alliances between Bistam and Qara Yusuf turned sour by 1412/1413. There is no clear explanation regarding the rift, but seems likely to be connected with a wider crisis of authority.^[5]