 Luther was also drawn into controversy of a more political and social kind, as he sought to respond to the events known as the “Peasants’ War” or “Peasants’ Revolt” (Bauernkrieg), when in 1525 large areas of central Europe saw agrarian grievances lead to more general disorder, partly fuelled by appeal to reformation ideas, and partly by an appeal to scripture which Luther himself had seemed to champion. Luther first responded with relative moderation in his Admonition to Peace, in which after criticising both the rulers and the peasants, he urged dialogue between the two parties. But the on-going violence led him to take sides with the secular authorities, as the title of his next work made clear: Against the Thieving, Murderous Hordes of Peasants. The vehement tone of this text shocked even Luther’s supporters, and led him to attempt to clarify his position further in An Open Letter on the Harsh Book Against the Peasants, though his basic stance was not much changed, and by then the damage was done. That stance was perhaps politically expedient to ensure continuing support from the princes for his reformation, but it nonetheless continues to raise questions regarding the integrity of his political judgement, and more generally for the significance of his social and political thought. In the same period, Luther sought to instill his form of theology and religious practice on the growing reformed communities through his German Mass (1526) and his catechisms (1529).