CASUALTY RECORD // August 18, 0636
Battle of Yarmouk
Estimated casualties — killed, wounded, captured, and missing — by side, with confidence labels per surviving record.
Casualties by side
2 sides catalogued · combined 74,000–124,000 estimated
Rashidun Caliphate
4,000
Medium-confidence figure
Byzantine Empire
70,000–120,000
Medium-confidence figure
Battle context
The Battle of Yarmouk, fought near the Yarmouk River in Byzantine Syria, was a decisive engagement between the Rashidun Caliphate and the Byzantine Empire during the Muslim conquest of the Levant. The battle's outcome effectively ended Byzantine rule in Syria, making it a turning point not only in the immediate campaign but in the broader history of the region. The Rashidun forces, commanded by a large roster of senior commanders including Khalid ibn al-Walid, Abu Ubayda ibn al-Jarrah, and Amr ibn al-As, inflicted casualties on the Byzantine side recorded at between 70,000 and 120,000 — far exceeding their own losses of around 4,000 — against a Byzantine force that may have outnumbered them. The scale of the Byzantine collapse confirmed Rashidun dominance over Syria and opened the path for continued Muslim expansion into the Levant.
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