Makeup blog. (for points.)

The Second Crusade was started in 1145. It was the second of the crusades committed by Christians at the time. These Crusades were in efforts to take back their holy city, Jerusalem.
The Second Crusade was launched from Europe. As supported by Pope Eugene III, the soldiers departed after the loss of the county of Edessa to the forces of Zengi. This had occurred in the previous year. This county had been founded in the First Crusade.
This crusade was the first to ever be led by a European kings. Both Louis VII of France and Conrad III of Germany contributed to the Second Crusade. The two armies of these kings were separated for more fighting power. Some other European nobles were also played a role in this war.

"After crossing Byzantine territory into Anatolia,
both armies were separately defeated by the Seljuk Turks." (source)
"Byzantine emperor Manuel I Comnenus secretly hindered the crusaders' progress,
particularly in Anatolia where he is alleged to have deliberately ordered Turks to attack them.
Louis and Conrad and the remnants of their armies reached Jerusalem and,
in 1148, participated in an ill-advised attack on Damascus.
The crusade in the east was a failure for the crusaders and a great victory for the Muslims."
(same source.)

The Second Crusade, as the quote had explained, was a loss for the Christians. When the armies had divided, the war had spiraled downwards. Being defeated as a whole, it was made easier for the opponent to keep conquering.
Yet, this was not the last of the Crusades in the fight for the holy city. This was merely the second attempt. There were more to come in the hopes that Jerusalem would finally be back in their hands.