Siege of Acre (1291)

The Siege of Acre (also called the Fall of Acre) took place in 1291 and resulted in the loss of the Crusader-controlled city of Acre to the Muslims. It is considered one of the most important battles of the period. Although the crusading movement continued for several more centuries, the capture of the city marked the end of further crusades to the Levant. When Acre fell, the Crusaders lost their last major stronghold of the Crusader Kingdom of Jerusalem. They still maintained a fortress at the northern city of Tartus (today in north-western Syria), engaged in some coastal raids, and attempted an incursion from the tiny island of Ruad, but when they lost that as well in 1302–3 in the Siege of Ruad, the Crusaders no longer controlled any part of the Holy Land.

• http://en.wikipedia.org/wiki/Siege of Acre (1291)