How many knights volunteered in the first crusade?

Approximately 10,000 to 15,000 knights volunteered to join the First Crusade, which began in 1096. This figure is part of a larger force that included tens of thousands of infantry and non-combatants. The knights were motivated by a mix of religious fervor, the promise of land and wealth, and the desire for adventure. The First Crusade ultimately aimed to recapture Jerusalem and other holy sites from Muslim control.