Final answer:
The Vikings did not fight in the Crusades.
Step-by-step explanation:
The group that did NOT fight in the Crusades were the Vikings. The Crusades were a series of military campaigns organized by European Christians in the medieval period to retake the Holy Land from Muslim control. The Crusaders consisted of Christians from various European kingdoms and states, as well as Muslims from the Middle East. However, Vikings, who were primarily from Scandinavian regions, did not participate in the Crusades as they focused on their own explorations and conquests.