In 1514, the Hungarian chancellor, Tamás Bakócz, returned from the Holy See with a papal bull issued by Leo X authorising a crusade against the Ottomans. He appointed Dózsa to organize and direct the movement. Within a few weeks, Dózsa had gathered an army of some 40,000 so-called "hajdú", consisting for the most part of peasants, wandering students, friars, and parish priests - some of the lowest-ranking groups of medieval society. They assembled in their counties, and by the time he had provided them with some military training, they began to air the grievances of their status. No measures had been taken to supply these voluntary crusaders with food or clothing. As harvest-time approached, the landlords commanded them to return to reap the fields, and, on their refusing to do so, proceeded to maltreat their wives and families and set their armed retainers upon the local peasantry.