Khalid ibn al-Walid

Khalid ibn al-Walid ibn al-Mughira al-Makhzumi 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, as a commander of the Muslim army. 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.