Siege of Aledo
1089 CE.
Shown on the map at 37.796°, -1.573°.
The Siege of Aledo was the unsuccessful attempt of the Almoravid Empire and Muslim Taifa Kingdoms in al-Andalus to retake the castle of Aledo from King Alfonso VI of Leon and Castile. It was one of many battles in the conflict between the Almoravids and the Taifa kingdoms on one side, and the Kingdom of Castile on the other.
Text from the Wikipedia article Siege of Aledo, licensed CC BY-SA 4.0.