Siege of Tripoli
1271 CE.
Shown on the map at 34.433°, 35.833°.
The 1271 siege of Tripoli was initiated by the Mamluk ruler Baibars against the Frankish ruler of the Principality of Antioch and the County of Tripoli, Bohemond VI. It followed the dramatic fall of Antioch in 1268, and was an attempt by the Mamluks to completely destroy the Crusader states of Antioch and Tripoli.
Text from the Wikipedia article Siege of Tripoli (1271), licensed CC BY-SA 4.0.