The Shepherd's Crusade

The Shepherds' Crusade refers to separate events from the 13th and 14th century. The first took place in 1251 during the Seventh Crusade; the second occurred in 1320.

In 1248, Louis IX of France went on the Seventh Crusade, but after the defeat of the crusaders, he was captured at Cairo in Egypt.

A peasant movement arose in northern France to support Louis, led by "the Master of Hungary", apparently a very old Hungarian monk, who claimed to have been instructed by the Virgin Mary to lead the shepherds of France to the Holy Land to rescue Louis. He led up to 60,000 mostly young peasants to Paris, where he met with Louis IX's mother, the acting regent.

The group split up after leaving the city and created disturbances in places such as Rouen, Tours and Orléans. In Amiens, and then in Bourges, they also began to attack Jews. The authorities rounded up and excommunicated the crusaders. However a group led by the Master resisted the authorities outside Bourges, resulting in the Master being killed in the ensuing skirmish.

http://en.wikipedia.org/wiki/Shepherds%27_Crusade