The Council of Clermont was a significant assembly held in November 1095 in Clermont, France. Convened by Pope Urban II, the council aimed to address various church reforms and the growing threat of Islamic expansion into Christian territories. It is most famous for launching the First Crusade, encouraging Christians to reclaim the Holy Land. During the council, Pope Urban II delivered a passionate speech, calling for military support to aid the Byzantine Empire against Muslim forces. His appeal inspired many knights and commoners to join the crusade, leading to a massive mobilization of troops and the eventual capture of Jerusalem in 1099.