Later, while serving as governor of Baghdad Province, Abdülcelilzade returned control of Kirkuk and Erbil to the Ottoman Empire, which Nader Shah had previously occupied with the consent of Ahmed Pasha.

The Ottoman Empire completed its military preparations against Iran with the help of Baghdad Governor Ahmed Pasha’s diversionary tactics against Nader Shah, who managed to suppress them until the Nowruz festival.

[2] The commander of the Kars garrison, Nişancı Ahmed Pasha, received orders to assist Iranian prince Safi Mirza, who was vying for the throne.

He then sent a letter to the garrison commander, Nişancı Ahmed Pasha, offering surrender, stating that artillery was unnecessary and that cutting off the water supply would be sufficient to capture the castle.

Nader Shah then placed camel-loads of cotton from Revan between tree stakes to block the Kars Stream and cut off the castle's water supply.

After these failed tactics, Nader Shah invited the Ottoman ambassador, Defterdar Kesriyeli Ahmet Efendi, to his headquarters and made new peace offers, but they were again rejected.

Soldiers from Alâiye, Karahisar, and Icel banners defended the hill slopes, with Bayrakdar Ahmed Pasha in charge of the Timurpasa Bastion.

Casualties increased due to harsh weather, and on 9 October 1744, after 73 days of an unsuccessful siege, Nader Shah ordered a retreat.