It is unclear what an "attacker" is.
If it refers to the armies trained by the Abbassids, then the Mamluks (Türkic Slave Armies) and the traditional Islamic Armies are the "attackers".
If it refers to those empires which opposed the Abbassids militarily and offensively, they incude: the Spanish Umayyads, the Idrissids, the Aghlabids, the Fatimids, the Tahirids, the Samanids, and the Mongols (who finally finished off the Abbassid Caliphate with the Siege and Massacre of Baghdad in 1256).
The Mongolians
Appropriate collective nouns for attackers are a band of attackers, a gang of attackers, a group of attackers, etc.
Abbasid Caliphate was created in 750.
The source of Abbasid's power was a standing army.
Attackers was created in 1996.
The Abbasids are the Abbasid people in the Abbasid dynasty. Abbasid refers to Abbas Ibn Abd Al Muttaleb the uncle of the prophet Muhammad (peace be upon him)
The Abbasids are the Abbasid people in the Abbasid dynasty. Abbasid refers to Abbas Ibn Abd Al Muttaleb the uncle of the prophet Muhammad (peace be upon him)
lovers
The Abbasid Caliph Abu Jaafar al-Mansour.
Al-Rashid - Abbasid Caliph - was born in 1109.
Al-Rashid - Abbasid Caliph - died in 1136.
Az-Zahir - Abbasid caliph - was born in 1176.
Az-Zahir - Abbasid caliph - died in 1226.