Events on August 12
| Date | Type | Event |
|---|---|---|
| 12 August 1099 | Battles & Sieges | (12 August) Crusaders under the command of Godfrey of Bouillon defeated Fatimid forces led by Al-Afdal Shahanshah at the Battle of Ascalon. |
| 12 August 1164 | Battles & Sieges | (12 August) Nur ad-Din Zangi defeated the Crusader armies of the County of Tripoli and the Principality of Antioch at the Battle of Harim. |
| 12 August 1687 | Battles & Sieges | (12 August) The Ottomans lost the Second Battle of Mohács. The Grand Vizier Sarı Süleyman Pasha commanded the Ottoman forces. |