Person attributes
Mu'awiya I was the founder and first caliph of the Umayyad Caliphate, ruling from 661 until his death. He became caliph less than thirty years after the death of the Islamic prophet Muhammad and immediately after the four Rashidun ('rightly-guided') caliphs. Unlike his predecessors, who had been close, early companions of Muhammad, Mu'awiya was a relatively late follower of the Islamic prophet.

Main information
Mu'awiya and his father Abu Sufyan had opposed Muhammad, their distant Qurayshite kinsman and later Mu'awiya's brother-in-law, until Muhammad captured Mecca in 630. Afterward, Mu'awiya became one of Muhammad's scribes. He was appointed by Caliph Abu Bakr (r. 632–634) as a deputy commander in the conquest of Syria. He moved up the ranks through Umar's caliphate (r. 634–644) until becoming governor of Syria during the reign of his Umayyad kinsman, Caliph Uthman (r. 644–656). He allied with the province's powerful Banu Kalb tribe, developed the defenses of its coastal cities, and directed the war effort against the Byzantine Empire, including the first Muslim naval campaigns. In response to Uthman's assassination in 656, Mu'awiya took up the cause of avenging the caliph and opposed his successor, Ali. During the First Muslim Civil War, the two led their armies to a stalemate at the Battle of Siffin in 657, prompting an abortive series of arbitration talks to settle the dispute. Afterward, Mu'awiya gained recognition as caliph by his Syrian supporters and his ally Amr ibn al-As, who conquered Egypt from Ali's governor in 658. Following the assassination of Ali in 661, Mu'awiya compelled Ali's son and successor Hasan to abdicate and Mu'awiya's suzerainty was acknowledged throughout the Caliphate.
Domestically, Mu'awiya relied on loyalist Syrian Arab tribes and Syria's Christian-dominated bureaucracy. He is credited with establishing government departments responsible for the postal route, correspondence, and chancellery. He was the first caliph whose name appeared on coins, inscriptions, or documents of the nascent Islamic empire. Externally, he engaged his troops in almost yearly land and sea raids against the Byzantines, including a failed siege of Constantinople, though the tide turned against the Arabs toward the end of his reign and he sued for a truce. In Iraq and the eastern provinces, he delegated authority to the powerful governors al-Mughira and Ziyad ibn Abi Sufyan, the latter of whom he controversially adopted as his brother. Under Mu'awiya's direction, the Muslim conquest of Ifriqiya (central North Africa) was launched by the commander Uqba ibn Nafi in 670, while the conquests in Khurasan and Sijistan on the eastern frontier were resumed.
Mu'awiya confined the influence of his Umayyad clan to the governorship of Medina, he nominated his own son, Yazid I, as his successor. It was an unprecedented move in Islamic politics and opposition to it by prominent Muslim leaders, including Ali's son Husayn, and Abd Allah ibn al-Zubayr, persisted after Mu'awiya's death, culminating with the outbreak of the Second Muslim Civil War. While there is considerable admiration for Mu'awiya in the contemporary sources, he has been criticized for lacking the justice and piety of the Rashidun and transforming the office of the caliphate into a kingship. Besides these criticisms, Sunni Muslim tradition honors him as a companion of Muhammad and a scribe of Qur'anic revelation.

Governorship of Syria
After Muhammad died in 632, Abu Bakr became caliph (leader of the Muslim community). He and his successors Umar, Uthman, and Ali are often known as the Rashidun ('rightly-guided') caliphs to distinguish them from Mu'awiya and his Umayyad dynastic successors. He was dispatched as one of four commanders in charge of the Muslim conquest of Byzantine Syria in c. 634. The caliph appointed Mu'awiya commander of Yazid's vanguard. Through these appointments Abu Bakr gave the family of Abu Sufyan a stake in the conquest of Syria, where Abu Sufyan already owned property in the vicinity of Damascus.
Abu Bakr's successor Umar (r. 634–644) appointed a leading companion of Muhammad, Abu Ubayda ibn al-Jarrah, as the general commander of the Muslim army in Syria in 636 after the rout of the Byzantines at the Battle of Yarmouk, which paved the way for the conquest of the rest of Syria. Mu'awiya was among the Arab troops that entered Jerusalem with Caliph Umar in 637. Afterward, Mu'awiya and Yazid were dispatched by Abu Ubayda to conquer the coastal towns of Sidon, Beirut and Byblos. Following the death of Abu Ubayda in the plague of Amwas in 639, Umar split the command of Syria, appointing Yazid as governor of the military districts of Damascus, Jordan and Palestine, and the veteran commander Iyad ibn Ghanm governor of Homs and the Jazira (Upper Mesopotamia). When Yazid succumbed to the plague later that year, Umar appointed Mu'awiya the military and fiscal governor of Damascus, and possibly Jordan as well.
The successive promotions of Abu Sufyan's sons contradicted Umar's efforts to otherwise curtail the influence of the Qurayshite aristocracy in the Muslim state in favor of the earliest Muslim converts (i.e. the Muhajirun and Ansar groups). According to the historian Leone Caetani, this exceptional treatment stemmed from Umar's personal respect for the Umayyads, the branch of the Banu Abd Shams to which Mu'awiya belonged. This is doubted by the historian Wilferd Madelung, who surmises that Umar had little choice, due to the lack of a suitable alternative to Mu'awiya in Syria and the ongoing plague in the region, which precluded the deployment of commanders more preferable to Umar from Medina.
Upon the accession of Caliph Uthman (r. 644–656), Mu'awiya's governorship was enlarged to include Palestine, while a companion of Muhammad, Umayr ibn Sa'd al-Ansari, was confirmed as governor of the Homs-Jazira district. In late 646 or early 647, Uthman attached the Homs-Jazira district to Mu'awiya's Syrian governorship, greatly increasing the military manpower at his disposal.
During the reign of Uthman, Mu'awiya allied with the Banu Kalb, the predominant tribe in the Syrian steppe extending from the oasis of Dumat al-Jandal in the south to the approaches of Palmyra and the chief component of the Quda'a confederation present throughout Syria. Medina consistently courted the Kalb, which had remained mostly neutral during the Arab–Byzantine wars, particularly after the central government's entreaties to the Byzantines' principal Arab allies, the Christian Ghassanids, were rebuffed. Before the advent of Islam in Syria, the Kalb and the Quda'a, long under the influence of Greco-Aramaic culture and the Monophysite church, had served Byzantium as subordinates of its Ghassanid client kings to guard the Syrian frontier against invasions by the Sasanian Persians and the latter's Arab clients, the Lakhmids. By the time the Muslims entered Syria, the Kalb and the Quda'a had accumulated significant military experience and were accustomed to hierarchical order and military obedience. To harness their strength and thereby secure his foothold in Syria, Mu'awiya consolidated ties to the Kalb's ruling house, the clan of Bahdal ibn Unayf, by wedding the latter's daughter Maysun in c. 650. He also married Maysun's paternal cousin, Na'ila bint Umara, for a short period.
Mu'awiya's reliance on the native Syrian Arab tribes was compounded by the heavy toll inflicted on the Muslim troops in Syria by the plague of Amwas, which caused troop numbers to dwindle from 24,000 in 637 to 4,000 in 639. The focus of Arabian tribal migration was toward the Sasanian front in Iraq. Mu'awiya oversaw a liberal recruitment policy that resulted in considerable numbers of Christian tribesmen and frontier peasants filling the ranks of his regular and auxiliary forces. Indeed, the Christian Tanukhids and the mixed Muslim–Christian Banu Tayy formed part of Mu'awiya's army in northern Syria. To help pay for his troops, Mu'awiya requested and was granted ownership by Uthman of the abundant, income-producing, Byzantine crown lands in Syria, which were previously designated by Umar as communal property for the Muslim army.
Although Syria's rural, Aramaic-speaking Christian population remained largely intact, the Muslim conquest had caused a mass flight of Greek Christian urbanites from Damascus, Aleppo, Latakia and Tripoli to Byzantine territory, while those who remained held pro-Byzantine sympathies. In contrast to the other conquered regions of the Caliphate, where new garrison cities were established to house Muslim troops and their administration, in Syria the troops settled in existing cities, including Damascus, Homs, Jerusalem, Tiberias, Aleppo and Qinnasrin. Upon Uthman's direction, Mu'awiya settled groups of the nomadic Tamim, Asad and Qays tribes to areas north of the Euphrates in the vicinity of Raqqa.
Caliphate
After Ali was killed, Mu'awiya left al-Dahhak ibn Qays in charge of Syria and led his army toward Kufa, where Ali's son al-Hasan had been nominated as his successor. He successfully bribed Ubayd Allah ibn Abbas, the commander of al-Hasan's vanguard, to desert his post and sent envoys to negotiate with al-Hasan. In return for a financial settlement, al-Hasan abdicated and Mu'awiya entered Kufa in July or September 661 and was recognized as caliph.
Before and/or after Ali's death, Mu'awiya received oaths of allegiance in one or two formal ceremonies in Jerusalem, the first in late 660 or early 661 and the second in July 661. The 10th-century Jerusalemite geographer al-Maqdisi holds that Mu'awiya had further developed a mosque originally built by Caliph Umar on the Temple Mount, the precursor of the al-Aqsa Mosque, and received his formal oaths of allegiance there. According to the earliest extant source about Mu'awiya's accession in Jerusalem, the near-contemporaneous Maronite Chronicles, composed by an anonymous Syriac author, Mu'awiya received the pledges of the tribal chieftains and then prayed at Golgotha and the Tomb of the Virgin Mary in Gethsemane, both adjacent to the Temple Mount.
There is little information in the early Muslim sources about Mu'awiya's rule in Syria, the center of his caliphate. He established his court in Damascus and moved the caliphal treasury there from Kufa. He relied on his Syrian tribal soldiery, numbering about 100,000 men, increasing their pay at the expense of the Iraqi garrisons, also about 100,000 soldiers combined. The highest stipends were paid on an inheritable basis to 2,000 nobles of the Quda'a and Kinda tribes, the core components of his support base, who were further awarded the privilege of consultation for all major decisions and the rights to veto or propose measures. The respective leaders of the Quda'a and the Kinda, the Kalbite chief Ibn Bahdal and the Homs-based Shurahbil, formed part of his Syrian inner circle along with the Qurayshites Abd al-Rahman ibn Khalid, son of the distinguished commander Khalid ibn al-Walid, and al-Dahhak ibn Qays.
Mu'awiya is credited by the early Muslim sources for establishing diwans (government departments) for correspondences (rasa'il), chancellery (khatam) and the postal route (barid). According to al-Tabari, following an assassination attempt by the Kharijite al-Burak ibn Abd Allah on Mu'awiya while he was praying in the mosque of Damascus in 661, Mu'awiya established a caliphal haras (personal guard) and shurta (select troops) and the maqsura (reserved area) within mosques. The caliph's treasury was largely dependent on the tax revenues of Syria and income from the crown lands that he confiscated in Iraq and Arabia. He also received the customary fifth of the war booty acquired by his commanders during expeditions.
Syria retained its Byzantine-era bureaucracy, which was staffed by Christians including the head of the tax administration, Sarjun ibn Mansur. The latter had served Mu'awiya in the same capacity before his attainment of the caliphate, and Sarjun's father was the likely holder of the office under Emperor Heraclius (r. 610–641).[124] Mu'awiya was tolerant toward Syria's native Christian majority. In turn, the community was generally satisfied with his rule, under which their conditions were at least as favorable as under the Byzantines. Mu'awiya attempted to mint his own coins, but the new currency was rejected by the Syrians as it omitted the symbol of the cross. The sole epigraphic attestation to Mu'awiya's rule in Syria, a Greek inscription dated to 663 discovered at the hot springs of Hamat Gader near the Sea of Galilee, refers to the caliph as Abd Allah Mu'awiya, amir al-mu'minin ("God's Servant Mu'awiya, commander of the faithful"; the caliph's name is preceded by a cross) and credits him for restoring Roman-era bath facilities for the benefit of the sick. According to the historian Yizhar Hirschfeld, "by this deed, the new caliph sought to please" his Christian subjects. He demonstrated a keen interest in Jerusalem. Although archaeological evidence is lacking, there are indications in medieval literary sources that a rudimentary mosque on the Temple Mount existed as early as Mu'awiya's time or was built by him.

