The First Crusade occurred was due to take place in 1096 led by Adhemar Bishop of Puy. The various parties were due to assemble at Constantinople, but some arrived early and others were wiped out on the way. The
First Crusade proper took place in 1097 led by Godfrey of Bouillon and others. They invaded Asia Minor and in 1098 captured Antioch after a long siege and Jerusalem in 1099. Research First Crusade