This was the "people's crusade." Never before in the whole history of the world had there been such a spectacle as these masses of practically leaderless people moved by an idea. It was a very crude idea. When they got among foreigners, they do not seem to have realized that they were not already among the infidel. Two great mobs, the advance guard of the expedition, committed such excesses in Hungary, where the language must have been incomprehensible to them, as to provoke the Hungarians to destroy them. They were massacred. A third host began with a great pogrom of the Jews in the Rhineland—for the Christian blood was up—and this multitude was also dispersed in Hungary. Two other hosts under Peter got through and reached Constantinople, to the astonishment and dismay of the Emperor Alexius. They looted and committed outrages as they came,