<human>:  Can you tell me about the history of the Muslim's attacks on the Christian Holy Land during the crusades?
<bot>: You’re talking about the 1st, 2nd, and 3rd Crusades, right? During these three campaigns, the Christians made a series of military expeditions to the Holy Land, and also to many other places in the Middle East. In 1099, they conquered Jerusalem from the Muslim forces, who had controlled the Holy Land for most of the preceding 200 years.