Ibn Bahdal
Hassan ibn Malik ibn Bahdal al-Kalbi, was the Umayyad governor of Palestine and Jordan during the reigns of Mu'awiya I and Yazid I, a senior figure in the caliph's court, and a chieftain of the Banu Kalb tribe. He owed his position both to his leadership of the powerful Kalb, a major source of troops, and his kinship with the Umayyads through his aunt Maysun bint Bahdal, the wife of Mu'awiya and mother of Yazid. Following Yazid's death, Ibn Bahdal served as the guardian of his son and successor, Mu'awiya II, until the latter's premature death in 684. Amid the political instability and rebellions that ensued in the caliphate, Ibn Bahdal attempted to secure the succession Mu'awiya II's brother Khalid, but ultimately threw his support behind Marwan I, who hailed from a different branch of the Umayyads. Ibn Bahdal and his tribal allies defeated Marwan's opponents at the Battle of Marj Rahit and secured for themselves the most prominent roles in the Umayyad administration and military.
Family
Hassan ibn Malik was a grandson of Bahdal ibn Unayf, chieftain of the Banu Kalb, one of the largest Bedouin tribes in 7th-century Arabia and Syria. Though not a son of Bahdal, Hassan was commonly referred to in medieval sources as "Ibn Bahdal". They belonged to the Kalb's princely house, known as the Banu Haritha ibn Janab, which gave Ibn Bahdal prestige and authority over his tribesmen. Moreover, through his aunt, Maysun bint Bahdal, Ibn Bahdal was also a cousin of the Umayyad caliph Yazid I, which increased his influence with the ruling Umayyad dynasty. He later became Yazid's brother-in-law as well.Career with the Umayyads
Commander and governor under Mu'awiya I and Yazid
Prior to the establishment of the Umayyad Caliphate in 661, Ibn Bahdal fought for a member of the dynasty and governor of Syria, Mu'awiya I, against the partisans of Caliph Ali at the Battle of Siffin in 657. During that battle, Ibn Bahdal was in command of his Quda'a confederate tribesmen from Jund Dimashq. Later, Ibn Bahdal was among three of Bahdal's grandchildren who dominated the Umayyad political scene during the Sufyanid period; the Sufyanids were descendants of the Umayyad tribe's Abi Sufyan line, which ruled the Caliphate between 661 and 684. Owing to the power of the Banu Kalb and his marital relations with the Sufyanids, Ibn Bahdal was appointed governor over Jund Filastin and Jund al-Urdunn by Mu'awiya I and Yazid I. Ibn Bahdal accompanied Yazid to Damascus, where the latter came to assume the caliphate following Mu'awiya's death. He went on to be an influential voice in Yazid's court.Role in Umayyad succession crisis
Yazid also appointed Ibn Bahdal's brother, Sa'id ibn Malik, as governor of Jund Qinnasrin . This district was dominated by Qaysi tribes resentful of the Kalb's privileged position in the Umayyad court. Sa'id's authority in Qinnasrin was "beyond the endurance of the Qais", according to historian Julius Wellhausen. Under their main leader in the district, Zufar ibn al-Harith al-Kilabi, the Qays ousted Sa'id. Meanwhile, Yazid died in 683 and Ibn Bahdal became the guardian of his young sons, Mu'awiya II, Khalid and Abd Allah. As a result of Ibn Bahdal's influence, Mu'awiya II succeeded his father as caliph, but died of illness in 684, sparking a leadership crisis in the Caliphate at a time when the Mecca-based Abd Allah ibn al-Zubayr was recognized as caliph in the Hejaz and Iraq.Ibn Bahdal supported Mu'awiya's younger half brothers' claims to succession, though their youth and inexperience generally precluded either of them from being accepted as caliphs by the ashraf of Syria. In Syria, the governor of Damascus, al-Dahhak ibn Qays al-Fihri, leaned toward Ibn al-Zubayr, while the governors of Jund Hims and Qinnasrin, Nu'man ibn Bashir al-Ansari and Zufar ibn al-Harith al-Kilabi, respectively, the Qaysi tribes in general, and even members of the extended Umayyad family offered their full-fledged recognition of Ibn al-Zubayr's sovereignty.
Ibn Bahdal fervently sought to maintain Umayyad rule, and by extension, the administrative and courtly privileges of his household and the Banu Kalb. He left his home in Palestine for Jordan to keep a closer eye on developments in Damascus. He assigned Rawh ibn Zinba', a chieftain of the Judham, as his replacement in Palestine, but Rawh was soon after expelled by his rival in the Judham, Natil ibn Qays, who rebelled and gave allegiance to Ibn al-Zubayr. Meanwhile, the expelled Umayyad governor of Iraq, Ubayd Allah ibn Ziyad, arrived in Damascus and strove to uphold Umayyad rule. However, instead of Yazid's young children, Ubayd Allah turned to Marwan I, a non-Sufyanid member of the Umayyad clan; the latter had been on his way to Mecca to recognize Ibn al-Zubayr's caliphate, but Ubayd Allah persuaded him to return to Palmyra and claim the throne himself.
Ibn Bahdal still favored Khalid ibn Yazid and presided over a meeting of the Umayyad family and the Syrian ashraf, excluding Ubayd Allah, to settle the matter of Mu'awiya II's succession. The meeting was not held in the capital Damascus where al-Dahhak, whose allegiance was still under suspicion, ruled, but in Jabiya, a major town in the Jordan district. Al-Dahhak did not attend the meeting, having been convinced by the ashraf of Qays to boycott and mobilize for war. At the Jabiya summit, Ibn Bahdal declared Ibn al-Zubayr to be a munafiq who betrayed the Umayyad cause. The attending ashraf agreed, but rejected both Khalid and Abd Allah, saying "we dislike the idea that the others should come to us with a shaykh while we bring them a youngster". After forty days of talks, the Jabiya summit concluded with an agreement nominating Marwan as the new caliph. Although Ibn Bahdal's candidate was rejected, he managed to secure a stipulation whereby Khalid would succeed Marwan. Moreover, in exchange for his nomination, Marwan had financial and administrative obligations to Ibn Bahdal, the Banu Kalb and the attending ashraf.
Al-Dahhak, meanwhile, had pitched camp at Marj Rahit, north of Damascus, with the garrison of Damascus, publicly proclaimed his allegiance with Ibn al-Zubayr and renounced the Umayyad dynasty. The Qaysi governors of Qinnasrin and Hims sent al-Dahhak troops, as did Natil ibn Qays of Palestine. Marwan's tribal allies included the Kalb of Jordan, the Kindites and the Ghassanids. While the historian Patricia Crone states Ibn Bahdal was present at Marj Rahit, the medieval historian al-Tabari wrote that Ibn Bahdal "rode off to the Jordan district". In July 684, the two sides fought in the Battle of Marj Rahit, which ended with a massive rout for the Qays and the slaying of al-Dahhak. With this Marwan assumed the caliphate in Damascus while the repercussions of the battle led to a long-running blood feud between Qays and Kalb. In these later battles, the Kalb was led by Ibn Bahdal's cousin, Humayd ibn Hurayth ibn Bahdal.