Why did the crusaders join the cause?

Crusaders joined the cause for a variety of reasons, including religious fervor and the desire to reclaim the Holy Land from Muslim control. Many were motivated by the promise of spiritual rewards, such as forgiveness of sins and the opportunity for martyrdom. Additionally, economic incentives, such as land acquisition and wealth, along with the lure of adventure and the chance to gain social status, also played significant roles in attracting participants to the crusades.