The Fifth Council of the Lateran (1512–1517) focused on internal reform of the Catholic Church, restoring peace among Christian rulers, and establishing papal supremacy, as well as planning a new crusade against the Turks, but it did not deal directly with the Eastern Churches, focusing instead on internal disciplinary and doctrinal issues in the run-up to the Protestant Reformation sparked shortly after the council's conclusion with Martin Luther's 95 Theses. Although there were plans for a new crusade (which ultimately failed), in-depth discussion of unification or substantive relations with the Eastern (Orthodox or Oriental) Churches was not a central issue in its decrees, as it had been at earlier councils (e.g., Lyon or Florence).