Which crusades was the only one to achieve real success?

The First Crusade, launched in 1096, is often regarded as the only crusade to achieve significant success. It resulted in the capture of Jerusalem in 1099 and the establishment of several Crusader states in the Holy Land, such as the Kingdom of Jerusalem. This success was largely due to the disorganization of Muslim forces at the time and the determination of the crusading armies. Subsequent crusades generally failed to recapture or maintain these gains.