Ja'far, who had fled Azerbaijan, offered Marzuban the chance to overthrow his master and take over the administration of the province.

This policy of expansion was effective, for by the end of his reign Marzuban had gained the allegiance of most of the minor princes of the Caucasus and Armenia.

Marzuban's army, which included many volunteers eager to fight the infidel Rus, was numerically superior to the raiders.

Marzuban then laid siege to Barda, but received news that the Hamdanid amir of Mosul, Nasir al-Daula, had sent his nephew al-Husain b. Sa'id to take over Azerbaijan.

In 942, during the war between Marzuban and Daisam, al-Husain had been invested with the government of the province by the caliph, and now he intended to make good on his claim.

In around 948 Marzuban, angered by an insult his envoy had received from the Buwayhid amir of Jibal, Rukn al-Daula, decided to take the city of Ray as punishment.

Rukn al-Daula managed to delay Marzuban's campaign through diplomatic means, giving him time to gather reinforcements from his brothers.

[2] The Dailamite officers who had managed to escape from the battle at Qazvin decided to rally around Marzuban's father Muhammad, who was still in prison.

Wahsudan imprisoned him and sent Daisam to Azerbaijan, in the hopes that he could aid the sons of Marzuban against an army sent by Rukn al-Daula and led by Muhammad b.

This momentary weakness in the central administration allowed the Rawadids and Shaddadids to take control of the areas to the northeast of Tabriz and Dvin, respectively.

He later changed his mind and named his brother Wahsudan of Tarum as his successor, but he forgot to cancel his original will, resulting in an eruption of warfare after his death; for details of this, see Sallarids.