Siege of Aleppo (637)

36°11′53″N 37°09′48″E / 36.198133°N 37.16328°E / 36.198133; 37.16328

Siege of Aleppo.
Part of the Muslim conquest of Syria (Arab–Byzantine wars)
Aleppo citadel
Date August–October 637 AD Location Aleppo, Byzantine Syria Result Rashidun Caliphate victory Aleppo captured by Caliphate
Belligerents
Rashidun Caliphate	Byzantine Empire Ghassanids
Commanders and leaders
Khalid ibn al-Walid Abu Ubaidah ibn al-Jarrah	Joachim
Strength
17,000	Unknown
Casualties and losses
Minimal	Unknown but more than Muslims

The siege of Aleppo, the Byzantine stronghold and one of few remaining Byzantine castles in the northern Levant after the decisive Battle of Yarmouk, was laid between August and October 637.