, who commanded the Iranian forces Despite Abbas Mirza's soldiers appearing to be unprepared for a large fight, Iran's entry into the war in the summer of 1826 started out successfully. This was due to two factors. Yermolov was initially embroiled in a struggle in
Chechnya despite advocating for war; as a result, his men were unprepared for the war and were incapable to meet the approaching challenge. Second, with the support of their previous khans, the Muslim populace rose against Russians, as they had grown tired of being oppressed. In
Shirvan, Ganja,
Talish,
Shakki and Karabakh (aside from
Shusha), the stationed Russian troops were either driven out by the rebels or Iranian forces, or withdrew themselves. It is uncertain if rebellions occurred or were suppressed in
Quba, Baku,
Derbent and
Georgia. On 25 and 26 July, Russian and Iranian forces started to engage each other at Talish. Between 28 and 30 July, the Russian army fought an intense battle against Sardar, who conquered Pambak and Shuregol in northern Erivan. Meanwhile, his brother Hasan Khan Sari Aslan made attacks further north, forcing the Russians to withdraw to
Tiflis. Between 1 and 3 August, Bash Aparan was recovered by Sardar, who then started fighting the Russians at
Gyumri. On 12 August, Lankaran and Saliyan were conquered by the Iranian forces. During this period, a Russian battalion of 800 soldiers were ambushed and defeated by a force of 35,000 soldiers led by Abbas Mirza. Fath-Ali Shah's camp at Ardabil received 400 heads, while
Tabriz received 400 POWs (including the commander and 17 officers as well as two cannons). While some of his troops were still fighting the Russians in Talish, Abbas Mirza besieged Shusha on 6 August. According to Behrooz, "At this point, a number of blunders spelled catastrophe and defeat." Abbas Mirza rejected the proposal by his maternal uncle Amir Khan Devellu-Qajar to attack Shusha's fortress, as he knew it would be a prolonged siege. Instead, he entrusted Amir Khan with the care of his eldest son, Mohammad Mirza (later known as
Mohammad Shah Qajar), and ordered him to take control of Ganja. Colonel Iosif Reutt, the Russian commander of Shusha, disarmed the Muslims residing there, and then mounted an effective defense with the aid of the local Armenians. The siege of Shusha dragged on for a long time because Abbas Mirza's artillery was unable to break through. Iosif started negotiating with Abbas Mirza to buy himself some time while he waited for Russian reinforcements. In a letter to Abbas Mirza, Amir Khan demanded additional cannons and five or six
Nezam-e Jadid regiments in order to battle the Russian reinforcements led by Lieutenant General
Valerian Madatov. He was given explicit instructions by Abbas Mirza to collect the Russian weaponry and equipment that had been seized and to wait within the Ganja castle until he was done with Shusha. But when Amir Khan learned of the impending Russian army led by Madatov (10,000
Cossacks, twelve infantry battalions, and twelve artillery pieces) he organized a 5,000-man cavalry force and, with Mohammad Mirza at his side, marched towards
Shamkor. This led to the Battle of Shamkor on 16 September, where Madatov defeated the forces of Amir Khan, who was killed. Mohammad Mirza withdrew to Ganja, which was shortly afterwards abandoned by its defenders, who withdrew to Shusha. On 17 September, Ganja surrendered to Madatov without any opposition. With reinforcements, General
Ivan Paskevich arrived in the Caucasus on 22 September and assumed command of the Russian forces on 29 September, thus replacing Yermolov. A member of the Cossack elite from
Ukraine, Paskevich embodied the goals of Russian imperialism. He had already proven himself effective throughout the
Napoleonic Wars and against the
Ottoman Empire in 1814. , made by
Franz Roubaud in 1887 The same day, Abbas Mirza marched towards Ganja, leaving a small force to carry on Shusha's siege. On 13–17 October, the
Battle of Ganja took place, close to the tomb of the famous Persian poet
Nizami Ganjavi, who lived in the 12th-century. As was customary, Abbas Mirza assigned three of his sons to accompany various units within his 30,000-man army. Mohammad Mirza was in charge of one unit, while the two underage sons
Jahangir Mirza and
Khosrow Mirza were in two other units, being escorted by their tutors. But fearing for their safety in the midst of battle, Abbas Mirza gave the tutors the order to evacuate Jahangir Mirza and Khosrow Mirza. As a result of this maneuver, the center of his army fell apart, leading to his defeat. From this point on, loss was imminent for the Iranians as this was the war's most important fight. A witness to the Battle of Ganja noted the following; "The action was at first well contested; and had Abbas Mirza possessed the talent of a commander, the Russian power in Georgia would have been at an end." , made by
Franz Roubaud in 1893 By 1827, Abbas Mirza was losing the war and he had to shift from attacking to defending. A fourteen-day raid south of the River Aras was carried out by Madatov in January.
Etchmiadzin surrendered in April, while
Abbasabad and
Ordubad, two fortresses in Nakhichevan, came under siege in July. On 7 July, Paskevich defeated Abbas Mirza, who had come to aid them, and both fortresses gave up. September saw the
surrender of the strongly fortified citadel of Erivan following a siege and intense bombardment, as well as the fortress of
Sardarabad. Using eight 24-pounder heavy guns and four 4-inch mortars, Paskevich destroyed the stronghold walls of Erivan. Sardar escaped Erivan before it was taken, but other commanders including Hasan Khan Sari Aslan, Hamzeh Khan Anzali and Mahmud Khan Maqsudilu, were taken prisoner and moved to Tiflis. Despite having a 20,000-man army under the command of Asef al-Dowleh, Tabriz (the most rich and populous city in Iran) surrendered without a fight on 24 October 1827. The city was given to Paskevich by an Islamic scholar. Following the Russian evacuation of Tabriz, Fath-Ali Shah ordered his execution, and while Abbas Mirza and Fath-Ali Shah watched, Asef al-Dowleh would be publicly whipped for his timidity. On 25 January 1828, the Russians captured and plundered
Ardabil, seizing its jewelry that dated back to the
Safavid era. == Aftermath ==