all battles that muslims were outnumbered and still won
[Wikipedia] Battle of Yaqusa
Battle of the Iron Bridge – 637 – Arab–Byzantine wars
Bohemond vs. the Turks: the Battle of the Iron Bridge, 1098
Siege of Damascus (634) Top # 9 Facts
The Battle of Marj Rahit was one of the early battles of the Second Islamic Civil War. It was fought on 18 August 684 between the Kalb-dominated armies of the Yaman, supporting the Umayyads under Caliph Marwan I, and the Qays under al-Dahhak ibn Qays al-Fihri, who supported the Mecca-based Abdallah ibn al-Zubayr; the latter had proclaimed himself Caliph. The Kalbi victory consolidated the position of the Umayyad, under Marwan I over Syria, paving the way for their eventual victory in the civil war against Ibn al-Zubayr. However, it also left a bitter legacy of division and rivalry between the Qays and the Yaman, which would contribute to much strife and instability for the remainder of the Umayyad Caliphate.