Mamluk Sultan Baibars conquers the Krak des Chevaliers, headquarters of the Knights Hospitaller in Syria. He doesn't do it by force of arms, but by a trick: he tricks the defenders into thinking that Tripoli had ordered them to surrender to him.
The name "Krak des Chevaliers" is a mixture of both Arabic and French and it means "Fortress of the Knights". The castle is famous for having served up to this point as the headquarters of the Knights Hospitaller in Syria during the Crusades.
Originally built in 1031 by the emir of Aleppo, the Krak des Chevaliers occupies a strategically important position east of Tripoli on a high cliff that is above the only route from Antioch to Beirut. Raymond IV of Toulouse captured it for the Crusaders in 1099 during the First Crusade but he had to abandon so he could continue his march to Jerusalem. Tancred of Hauteville occupied it again in 1110 and Raymond II, count of Tripoli, gave it to the Hospitallers in 1142.
The Hosptiallers expanded and rebuilt the Krak des Chevaliers until it was the largest and most powerful Crusader fortress in the entire Holy Land. Its outer wall was 30 meters thick and its seven guard towers each had walls up to 10 meters thick. Massive storage rooms were carved into the rock, creating enough space for supplies to allow the Hospitallers to withstand a siege as long as five years.