The Second Age of the Crusaders Episode 13 "The Fall of Jerusalem"

In 1239, the Barons' Crusade arrived in Palestine to help the Kingdom of Jerusalem. But it achieved little and, in 1244, Jerusalem was captured and sacked by a group of Turkish nomads. It would be nearly 700 years before a Christian army regained the city. 

Please take a look at my website nickholmesauthor.com where you can download a free copy of The Byzantine World War, my book that describes the origins of the First Crusade.