ORDER OF BATTLE // January 1, 0635
Battle of Fahl
Estimated force strength by side, with confidence labels per surviving record.
Forces engaged
2 sides catalogued · combined 70,000–130,000 estimated
Rashidun Caliphate
20,000–30,000
Medium-confidence figure
Byzantine Empire
50,000–100,000
Medium-confidence figure
Battle context
The Battle of Fahl, fought in the Jordan Valley near Pella and Scythopolis, was a major engagement in the Muslim conquest of Byzantine Syria during the broader Muslim conquest of the Levant. The battle brought together multiple senior Rashidun commanders — Abu Ubayda ibn al-Jarrah, Khalid ibn al-Walid, Amr ibn al-As, Shurahbil ibn Hasana, and Anas ibn Malik — against a Byzantine force under Theodore Trithyrius that substantially outnumbered the Arab army, with Byzantine strength estimated between 50,000 and 100,000 against a Rashidun force of 20,000 to 30,000. The reported Byzantine casualties of 100,000 indicate a decisive Arab victory, one that would have significantly degraded Byzantine capacity to defend the Jordan Valley and the surrounding region. Control of the area around Pella and Scythopolis held strategic weight within the Jordan Valley corridor, and the engagement formed part of the sustained Rashidun campaign to reduce Byzantine presence across Syria that characterized this phase of the conquest.
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