The Battle of Hattin in 1187 was a disastrous defeat for the Crusaders: Guy of Lusignan, King of Jerusalem, was captured, as was the True Cross, a relic discovered during the First Crusade. Afterwards Saladin ordered the execution of the captured Templar and Hospitaller knights, such was the importance of the two orders in defending the Crusader states. After the battle, the Hospitaller castles of Belmont, Belvoir, and Bethgibelin fell to Muslim armies. Following these losses, the Order focused its attention on its castles in Tripoli. In May 1188 Saladin led an army to attack Krak des Chevaliers, but on seeing the castle, decided it was too well defended and instead marched on the Hospitaller castle of Margat, which he also failed to capture.