Along with his brother Humayd, Hasan was active in the Abbasid cause in Khurasan during the years before the Revolution, serving as a deputy naqib.
In the early 4th Century Hijri at 318 H, Sayyid Ahmad al-Muhaajir bin Isa ar-Rumi bin Muhammad al-Naqib bin Ali al-Uraidhi ibn Ja'far al-Sadiq migrated from Basrah, Iraq first to Mecca and Medina, and then to Hadhramout, to avoid the chaos then prevalent in the Abbassid Caliphate, where descendants of Muhammad were continuously being suspected of arson and revolt against the caliph.
The Battle of Talas (or Battle of Artlakh) (怛羅斯會戰) (معركة نهر طلاس) in 751 AD was a conflict between the Arab Abbasid Caliphate and the Chinese Tang Dynasty, then under Emperor Xuanzong (together with various other peoples and nations associated with the geographical territory involved) for control not only of the Syr Darya region, but also a strategic area of Central Asia.
Following the death of Mutawwakil's heir, al-Muntasir, a few months later, Bugha and the other Turkic commanders of the Abbasid army selected al-Musta'in as his successor (see the "Anarchy at Samarra").
In 929, to impose its authority and end the riots and conflicts that ravaged the Iberian Peninsula, he proclaimed himself caliph, elevating the emirate to a position in prestige not only with the Abbasid caliph in Baghdad but also the Shi'ite caliph in Tunis—with whom he was competing for control of North Africa.
The Fourth Fitna (809–827 CE), including the Abbasid civil wars and other regional conflicts
The Ādāb is cast in the parallellistic mode of expression born of the early Khotba and expanded and elaborated in Omayyad hortatory compositions, unembroidered with contrived rhyming of the sort found in later Abbasid prose literature.
Since much of the Abbasid administration had been Persian anyway, the Buwayhid, who were Zaidi Shia, were quietly able to assume real power in Baghdad.
The concepts of welfare and pension were introduced in early Islamic law as forms of Zakat (charity), one of the Five Pillars of Islam, since the time of the Abbasid caliph Al-Mansur in the 8th century.
The Abbasid Caliphs from Abu Al-Abbas Al Saffah till the Last Caliph of Egypt, is mentioned in diagram, furthermore, diagram mention their lieange line from Caliph Al-Muntasir II to Saint Main Adam Shah Abbassi, and Their Cousin(s), Amir Sadiq Mohammed Khan Abbasi I.
After the suppression of the revolt of Abdallah ibn Ali against Caliph al-Mansur (r. 754–775) in Syria in 754, the long-simmering tension between Abu Muslim—who had come to rule Khurasan as a near-sovereign prince, practically independent of the Abbasid family—and al-Mansur came to the fore.
In 846 an Aghlabid force seized Rome and plundered the Vatican, though they were not able to hold onto Rome and Taranto and Bari soon detached themselves from the Aghlabids and submitted to the Abbasids in Baghdad.
In 875, Musa ibn Bugha, who had been given responsibility for Fars by the central government, sent an army under the command of 'Abd al-Rahman ibn Muflih to establish a firm Abbasid presence in the province.
Musa ibn Bugha al-Kabir (died 877 CE) was an Abbasid military leader of Turkic origin.
In the aftermath of the sack of Amorium, Theophilos sought the aid of other powers against the Abbasid threat: embassies were sent to both the western emperor Louis the Pious (r. 813–840) and to the court of Abd ar-Rahman II (r. 822–852), Emir of Córdoba.
On 11 February, it was reported that armed fighters—allegedly from Jabhat al-Nusra—shot at and beheaded a statue of the blind poet and philosopher Al-Maʿarri, who was born in the city during the Abbasid era.
Abu Bakr bin Yahya al-Suli (c. 880 – 946), poet and scholar at the Abbasid court
Nizam al-Mulk states in his Siyāsatnāma that Khorasani had delegated his authority and coffers in Rayy to Sunpadh prior to journeying to Baghdad, where he was eventually murdered by order of the second Abbasid Caliph, al-Mansur.
Clifford Edmund Bosworth explains that a number of Sunni sources were invariably hostile to Ya'qub because of the disrespect he showed toward the Abbasid caliph.