The First Crusade was launched in 1095 by Pope Urban II in response to a plea for help from the Byzantine Emperor Alexios I Komnenos, who was facing threats from the Seljuk Turks. The Crusade aimed to recapture Jerusalem and the Holy Land from Muslim control.
The Crusade was led by various European nobles and knights, including Godfrey of Bouillon, Raymond IV of Toulouse, and Bohemond of Taranto. After a long and arduous journey, the Crusaders finally reached Jerusalem in 1099 and successfully captured the city after a bloody siege.
The First Crusade was considered a success by the Christian forces, as they were able to establish several Crusader states in the region, including the Kingdom of Jerusalem. However, the Crusades would continue for several more centuries, with varying degrees of success and failure.