Final answer:
Peter the Hermit pulled together a makeshift army and led the People's Crusade, retaking Jerusalem from the Muslim Turks but losing his life in the process.
Step-by-step explanation:
Peter the Hermit's contribution to the early Crusades was that he pulled together a makeshift army of peasants and soldiers and led the People's Crusade. He is credited for retaking Jerusalem from the Muslim Turks. Although Peter the Hermit fought in Jerusalem, he did not convert to Islam. Instead, he lost his life fighting against the Muslim Turks.
Pope Urban II's cries were heard attentively by Peter the Hermit, who pleaded with people to save the Holy Sepulchre. Among the holy men in the audience was this monk. He was so moved by Pope Urban II's address that he started evangelising to men, women, and children in support of going to war with the Turks. The Crusade began when he was able to bring a large number of people together. He led one side of the troop and started the march with other leaders.