Siege of Ascalon
1247 CE.
Shown on the map at 31.662°, 34.546°.
The siege of Ascalon was launched by the Ayyubid sultan As-Salih Ayyub against the Hospitaller garrison of Ascalon, resulting in the Ayyubids taking control of Ascalon.
Text from the Wikipedia article Siege of Ascalon (1247), licensed CC BY-SA 4.0.