Peter the Hermit, a native of Amiens in France, leads 40,000 commoners out of Cologne on the Peasants' Crusade. He will arrive in Constantinople at the end of July with 30,000 people and doesn't receive a very warm welcome.
Alexios I Komnenos, Byzantine emperor, had no desire to provide food and care for 30,000 paupers, none of whom had resources to pay for what they needed.
The pauper army is relying entirely upon the grace of God to provide what they need. Most will come up empty. On their way to Constantinople large numbers start or are taken captive for being sold into slavery. Once they leave for Jerusalem, they are slaughtered by the Turks.