Eight centuries ago, during the Middle Ages, some European children were seized by visions. Jesus Christ appeared to them, urging them to redeem their people by marching to the Holy Land and peacefully converting the Muslims to Christianity. Their preaching inspired tens of thousands of idealistic European youth, who undertook the arduous journey to the Levant. The great majority died on the way – whether of starvation or disease – and most of the remaining gave up and chose to return home. A few managed to reach the Mediterranean sea, perhaps hoping to walk across, as did Moses and Jesus, but in the event were sold into slavery, ending up miserably in Tunisia.