Yazid I
The Battle of al-Harra ( ) was fought between the Syrian army of the Umayyad caliph Yazid I () led by Muslim ibn Uqba and the local defenders of Medina, namely the Ansar and Muhajirun factions, who had not accepted Yazid as the caliph. The battle took place at the lava field of Harrat Waqim in the northeastern outskirts of Medina on 26 August 683.