Final answer:
The First Crusade was the only successful Crusade, resulting in the reestablishment of Christian control over areas of Palestine and Syria and the creation of the Crusader States.
Step-by-step explanation:
The only successful Crusade was the First Crusade. It took place near the end of the eleventh century and resulted in the reestablishment of Christian control over areas of Palestine and Syria. The crusaders were able to take Jerusalem and other important cities, creating four Christian-ruled sovereign states in the Levant, known as the Crusader States. This was the only Crusade that accomplished its objective.
Crusaders