Who was slaughtered by a companion of Muhammad in 632?
Khalid ibn al-Walid Abū Sulaymān Khālid ibn al-Walīd ibn al-Mughīrah al-Makhzūmī (Arabic: أبو سليمان خالد بن الوليد بن المغيرة المخزومي‎ ‎ ‎; 585–642), also known as Sayf ullah al-Maslūl (Arabic: سيف الله المسلول‎ ‎ ; "Drawn Sword of God"), was a companion of Muhammad. He is noted for his military tactics and prowess, commanding the forces of Medina under Muhammad and the forces of his immediate successors of the Rashidun Caliphate, Abu Bakr and Umar ibn Khattab. It was under his military leadership that Arabia, for the first time in history, was united under a single political entity, the Caliphate. Commanding the forces of the nascent Islamic state, Khalid was victorious in over a hundred battles, against the forces of the Byzantine-Roman Empire, Sassanid-Persian Empire, and their allies, in addition to other Arab tribes. His strategic achievements include the conquest of Arabia during the Ridda Wars, Persian Mesopotamia and Roman Syria within several years from 632 to 636. He is also remembered for his decisive victories at Yamamah, Ullais, and Firaz, and his tactical successes at Walaja and Yarmouk.
Umar Umar ( ), also spelled Omar ( ; Arabic: عمر بن الخطاب‎ , "ʿUmar ibn Al-Khaṭṭāb ", 'Umar, Son of Al-Khattab' ‎ , born c.584 CEdied 3 November 644 CE), was one of the most powerful and influential Muslim caliphs in history. He was a senior companion of the Prophet Muhammad. He succeeded Abu Bakr (632–634) as the second caliph of the Rashidun Caliphate on 23 August 634. He was an expert Muslim jurist known for his pious and just nature, which earned him the epithet Al-Farooq ("the one who distinguishes (between right and wrong)"). He is sometimes referred to as Umar I by certain historians of Islam, since a later Umayyad caliph, Umar II, also bore that name.