Khalid ibn al-Walid

Khalid ibn al-Walid ibn al-Mughira al-Makhzumi (; died 642) was a 7th-century Arab military commander. He initially led campaigns against Muhammad on behalf of the Quraysh. He later became a Muslim and spent the remainder of his career serving Muhammad and the first two Rashidun caliphs: Abu Bakr and Umar. Khalid played leading command roles in the Ridda Wars against rebel tribes in Arabia in 632–633, the initial campaigns in Sasanian Iraq in 633–634, and the conquest of Byzantine Syria in 634–638.

As a horseman of the Quraysh's aristocratic Banu Makhzum clan, which ardently opposed Muhammad, Khalid played an instrumental role in defeating Muhammad and his followers during the Battle of Uhud in 625. In 627 or 629, he converted to Islam in the presence of Muhammad, who inducted him as an official military commander among the Muslims and gave him the title of (). During the Battle of Mu'ta, Khalid coordinated the safe withdrawal of Muslim troops against the Byzantines. He also led the Bedouins under the Muslim army during the Muslim conquest of Mecca in 629–630 and the Battle of Hunayn in 630. After Muhammad's death, Khalid was appointed to Najd and al-Yamama to suppress or subjugate the Arab tribes opposed to the nascent Muslim state; this campaign culminated in Khalid's victory over rebel leaders Tulayha and Musaylima at the Battle of Buzakha in 632 and the Battle of Yamama in 633, respectively.

Khalid subsequently launched campaigns against the predominantly Christian Arab tribes and the Sasanian Persian garrisons along the Euphrates valley in Iraq. Abu Bakr later reassigned him to command the Muslim armies in Syria, where he led his forces on an unconventional march across a long, waterless stretch of the Syrian Desert, boosting his reputation as a military strategist. As a result of decisive victories led by Khalid against the Byzantines at Ajnadayn (634), Fahl (634 or 635), Damascus (634–635), and the Yarmouk (636), the Muslim army conquered most of the Levant. Khalid was subsequently demoted and removed from the army's high command by Umar. Khalid continued service as the key lieutenant of his successor Abu Ubayda ibn al-Jarrah in the sieges of Homs and Aleppo and the Battle of Qinnasrin, all in 637–638. These engagements collectively precipitated the retreat of imperial Byzantine troops from Syria under Emperor Heraclius. Around 638, Umar dismissed Khalid from the governorship of Jund Qinnasrin. Khalid died in 642, either in Medina or Homs.

Khalid is generally considered by historians to be one of the most seasoned and accomplished generals of the early Islamic era, and he is likewise commemorated throughout the Arab world. Islamic tradition credits Khalid with his battlefield tactics and effective leadership during the early Muslim conquests. However, it also recounts incidents where he faced criticism, such as the execution of members of the Banu Jadhima during the lifetime of Muhammad, the execution of Malik ibn Nuwayra during the Ridda Wars, and allegations of misconduct in the Levant. Khalid's military fame disturbed some pious early Muslims, most notably Umar, who feared it could develop into a personality cult. Sunni Muslims revere Khalid as a war hero, while many Shia Muslims view him as a war criminal. Provided by Wikipedia