Mamluks from Egypt under Muslim Sultan Qalawun capture the Crusader city of Tripoli. There had been a truce between Tripoli and Qalawun, but infighting among the Europeans provided him with an excuse to break it and bring Tripoli under Muslim control once again.
The Crusaders in Tripoli had expected to drive off the Mamluks, just as they had done in 1271. The presence of reinforcements from Acre, the Knights Templar, and the Hospitallers certainly gave them cause for hope. The Mamluk catapults, however, do massive damage to the towers and walls of Tripoli, allowing them to enter the city after about a month.
Sultan Qalawun massacres the defenders and sells the women and children in to slavery. The city itself is razed to the ground and a new Tripoli is built a few miles away. The destruction of Tripoli on this date leads to the capture in two years of Acre, the final Crusader outpost in the region. This ends the Crusades.