A chronological history of the later Crusading era tracing mounting divisions among Western Christian factions and rival maritime republics, military and political upheavals in the Near East, the rise of Mamluk power and Mongol interventions, major sieges and the loss of key coastal cities, and the failed expedition to North Africa that led to the monarch's death. It examines internal feuds, shifting alliances, diplomatic contacts with eastern powers, and repercussions in Europe, including Sicilian unrest, concluding with the consolidation of Muslim control over former Crusader holdings.