Instead , Urban II called upon the knights of Christendom in a speech made at the Council of Clermont on 27 November 1095 , combining the idea of pilgrimage to the Holy Land with that of waging a holy war against infidels .
Instead of sending money , Urban II called upon the knights of Christendom in a speech made at the Council of Clermont on 27 November 1095 , combining the idea of pilgrimage to the Holy Land with that of waging a holy war against infidels .