muslims
The Crusades were the battle and a battle does not fight, soldiers in the battle fight. If your question was asking what the Crusaders were fighting for and who they were fighting against see the below link.
The European Crusaders fought Saladin.
Europe WAS the Crusaders and they fought in the Middle East to take Jerusalem.
The Muslim population of the Holy Land, who were in control of Palestine. Specifically, by about the 4th Crusade, Saladin's army.
During the Crusades, some Western European Christians targeted Eastern European Christians, particularly during the Fourth Crusade, due to a combination of religious zeal and political motives. The schism between the Roman Catholic Church and the Eastern Orthodox Church fueled animosity, leading Western crusaders to view Eastern Christians as heretics. Additionally, the desire for wealth, power, and territorial expansion often overshadowed the original religious goals of the Crusades, resulting in violence against fellow Christians. This tragic aspect highlights the complexities and contradictions within the Crusading movement.
The F8 Crusader was America's last true gunfighter, with guns as it's primary weapon, and not missiles. The Crusader fought only one war; Vietnam, against NVAF MiG17s, MiG19s, and MiG21s.
The Pope wanted the crusaders to drive the Muslims out of the Holy Land and return control to Christians.
The Crusaders, who were predominantly Christian knights from Western Europe, were the first Christians to fight against Muslims for control of the Holy Land during the Crusades in the 11th to 13th centuries.
The crusades affected the Muslims because the Muslims had what the crusaders wanted the crusaders went to war against the Muslims trying to get that "thing" back, which was Constantinople, and the crusaders killed half of Muslims to try and get Constantinople back.
The christian crusaders where fighting against the Muslim's . All three of the world larges religions fought over the same lands, there still having issues over today . This land based mostly in Israel and Palestine is the birth place for all three religions.
The Crusaders' main foes were the Muslim forces in the Holy Land, particularly the Seljuk Turks and later the Mamluks. These Muslim armies were defending their territories against the European Crusader incursions.
The Christians started a crusade against Muslims in the 11th century.