page_title: Battle of Yarmouk
section_title: Battle
hierarchical_section_title: Battle of Yarmouk / Battle
context_page_description: The Battle of Yarmouk was a major battle between the army of the Byzantine Empire and the Muslim forces of the Rashidun Caliphate. The battle consisted of a series of engagements that lasted for six days in August 636, near the Yarmouk River, along what are now the borders of Syria–Jordan and Syria–Israel, east of the Sea of Galilee. The result of the battle was a complete Muslim victory that ended Byzantine rule in Syria. The Battle of Yarmouk is regarded as one of the most decisive battles in military history, and it marked the first great wave of early Muslim conquests after the death of Muhammad, heralding the rapid advance of Islam into the then Christian Levant.
  To check the Arab advance and to recover lost territory, Emperor Heraclius had sent a massive expedition to the Levant in May 636. As the Byzantine army approached, the Arabs tactically withdrew from Syria and regrouped all their forces at the Yarmouk plains close to the Arabian Peninsula, where they were reinforced and defeated the numerically superior Byzantine army.
context_section_description: The battle lines of the Muslims and the Byzantines were divided into four sections: the left wing, the left centre, the right centre and the right wing. Note that the descriptions of the Muslim and the Byzantine battle lines are exactly each other's opposite: the Muslim right wing faced the Byzantine left wing (see image).
  Vahan was instructed by Heraclius not to engage in battle until all avenues of diplomacy had been explored., probably because Yazdegerd III's forces were not yet ready for the offensive in Iraq. Accordingly, Vahan sent Gregory and then Jabalah to negotiate, but their efforts proved futile. Before the battle, on Vahan's invitation, Khalid came to negotiate peace, with a similar end. The negotiations delayed the battles for a month.
  On the other hand, Umar, whose forces at Qadisiyah were threatened with confronting the Sassanid armies, ordered Sa`d ibn Abi Waqqas to enter negotiations with the Persians and to send emissaries to Yazdegerd III and his commander Rostam Farrokhzād, apparently inviting them to Islam. That was most probably the delaying tactic employed by Umar on the Persian front. Meanwhile, he sent reinforcements of 6,000 troops, mostly from Yemen, to Khalid. The force included 1,000 Sahaba (companions of Muhammad), among whom were 100 veterans of the Battle of Badr, the first battle in Islamic history, and included citizens of the highest rank, such as Zubayr ibn al-Awwam, Abu Sufyan, and his wife Hind bint Utbah.
  Also present were such distinct companions as Sa'id ibn Zayd, Fadl ibn Abbas, Abdul-Rahman ibn Abi Bakr (the son of Abu Bakr), Abdullah ibn Umar (the son of Umar), Aban ibn Uthman (the son of Uthman), Abdulreman ibn Khalid (the son of Khalid), Abdullah ibn Ja'far (the nephew of Ali), Ammar ibn Yasir, Miqdad ibn Aswad, Abu Dharr al-Ghifari, Malik al-Ashtar, Abu Ayyub al-Ansari, Qays ibn Sa'd, Hudhayfah ibn al-Yaman, Ubada ibn as-Samit, Hisham ibn al-A'as, Abu Huraira and Ikrimah ibn Abi Jahl. As it was a citizen army, in contrast to a mercenary army, the age of the soldiers ranged from 20 (in the case of Khalid's son) to 70 (in the case of Ammar). Three of the ten companions promised paradise by Muhammad, namely Sa'id, Zubayr and Abu Ubaidah, were present at Yarmouk.
  Umar, apparently wanting to defeat the Byzantines first, used the best Muslim troops against them. The continuing stream of Muslim reinforcements worried the Byzantines, who fearing that the Muslims with such reinforcements would grow powerful, decided that they had no choice but to attack. The reinforcements that were sent to the Muslims at Yarmouk arrived in small bands, giving the impression of a continuous stream of reinforcements to demoralize the Byzantines to compel them to attack. The same tactic would be repeated again during the Battle of Qadisiyah.
caption: Troop deployment.
     Muslim army   Byzantine army
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