The citizens of which European states took part in the first crusade?

The participants in this campaign were residents: France, England, Italy, Germany, as well as Greece (as part of the Byzantine Empire). Thus, in 1096, a large Crusader army advanced eastward. During this campaign, the Muslims were thrown back to the east. The city of Jerusalem, and with it the Holy Sepulcher, was in the hands of the crusaders. In the future, there was a constant struggle between the crusaders and the Muslims.