Battle of the Yarmuk

Battle of Yarmuk
Part of the Muslim conquest of Syria
(Arab–Byzantine wars)

Illustration of the Battle of Yarmuk by an anonymous Catalan illustrator (c. 1310 – 1325)
Date15–20 August 636
Location
Near the Yarmuk River, along the tripoint border of Syria, Jordan and Golan Heights
32°48′51″N 35°57′17″E / 32.8141°N 35.9548°E / 32.8141; 35.9548
Result Rashidun victory
Territorial
changes
Byzantine Syria was annexed by the Rashidun Caliphate
Belligerents
Rashidun Caliphate Byzantine Empire
Ghassanid Kingdom
Tanukhids
Commanders and leaders
Umar ibn al-Khattab
Khalid ibn al-Walid
Abu Ubayda ibn al-Jarrah
Amr ibn al-As
Yazid ibn Abi Sufyan
Shurahbil ibn Hasana
Ikrima ibn Amr 
Zubayr ibn al-Awwam
Al-Qa'qa' ibn 'Amr al-Tamimi
Amru bin Ma'adi Yakrib
Dirar ibn al-Azwar
Abd al-Rahman ibn Abi Bakr
Ubadah ibn al-Samit
Hind bint Utba
Heraclius
Theodore Trithyrius 
Vahan 
Jabalah ibn al-Aiham
Dairjan 
Niketas the Persian
Buccinator (Qanatir)
Gregory
Strength
15,000–40,000
(modern estimates)
24,000–40,000
(primary Arab sources)

40,000–50,000
(modern estimates)
80,000–100,000+
(Treadgold)
100,000–200,000
(primary Arab sources)

140,000
(primary Roman sources)
Casualties and losses
4,000 killed
Total casualties:
5,000–17,000
70,000–120,000 killed
(primary Arab sources)
10,000–50,000 killed (modern estimates)
Battle location on a map of modern Syria
Battle of the Yarmuk (Levant)
Battle of the Yarmuk (Middle East)

The Battle of the Yarmuk (also spelled Yarmouk; Arabic: معركة اليرموك) was a major battle between the Byzantine Empire and the Rashidun Caliphate near the Yarmouk River in Byzantine Syria that marked a crucial point in the Muslim conquest of Syria. The result of the battle was a decisive Arab victory that effectively ended Byzantine rule in Syria.

The battle consisted of a series of engagements that lasted for six days in August 636, near the Yarmouk River (called the Hieromykes River by the Greeks), along what are now the borders between Syria and Jordan and Syria and Israel, southeast of the Sea of Galilee. 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 Yarmuk plains close to the Arabian Peninsula, where they were reinforced, and defeated the numerically superior Byzantine army.

The Battle of the Yarmuk is regarded as one of the most decisive battles in military history. It was also Khalid ibn al-Walid's greatest military victory and cemented his reputation as one of the greatest tacticians and cavalry commanders in history. The battle marked the culmination of the first great wave of early Muslim conquests after the death of the Islamic prophet Muhammad, which witnessed the rapid advance of the Rashidun Caliphate into both the Sasanian Empire and the Byzantine Empire.