The siege of Acre, from 1189-1191 was one of the most brutal battles of the Third Crusade.  The armies of the King of Jerusalem surrounded the city of Acre, but were themselves under attack from the armies of Saladin.  Into this mess, the armies of the Third Crusade, led by King Richard the Lionheart of England and Philip Augustus of France, joined the fight.  The brutal siege lasted for two years, inflicting damage, disease, and death on both sides.  The catapults are in full swing, hurling Greek fire at the crusaders, while sappers tunnel under ground.  The Crusader states are divided over who should be king, and the fight ends with one of the most infamous massacres of the Third Crusade.