Siege of Baghdad (1055)

When Tughril returned from Anatolia with his army, the Abbasid caliph Qa'im told him through his envoy that the Buyids were trying to overthrow the Abbasids. Qa'im told Tughril to come to Baghdad with his army. Tughril and his army came to Baghdad in the same year and captured Baghdad. Al-Basasiri, the governor of Baghdad, left the city. Later, Basasiri entered the service of the Fatimids and captured Baghdad again, but the city was captured by the Seljuks in the final battle in 1059.