The Second Crusade was not as successful as the First Crusade. The European forces were divided and poorly coordinated. They suffered setbacks in Asia Minor when the Seljuk Turks defeated them at the Battle of Dorylaeum in 1147. Conrad III withdrew from the crusade after this defeat, leaving Louis VII to continue on to the Holy Land.
Louis VII and his army reached Jerusalem in 1148, but they were unable to capture it from the Muslims. They also failed to unite with other Christian forces in the region. Louis VII eventually gave up and returned to Europe.
The Second Crusade was a major failure. It did not succeed in recapturing the Holy Land, and it led to a weakening of the Crusader states. The crusade also caused a great deal of violence and bloodshed, as the European Christians slaughtered thousands of Muslims and Jews in their path.