22 When the mystical body of Christ was torn by so grave a schism, that even good men on both sides became heated in dispute, he bent all his efforts to settling disagreements and happily restoring unity of mind. When princes, led by desire of earthly dominion, were divided by fearful quarrels, and the welfare of nations was thereby seriously threatened, he was ever the peacemaker and the architect of agreement. When, finally, the holy places of Palestine, hallowed by the blood of our Divine Savior, were threatened with gravest danger, and were hard pressed by foreign armies, at the command of the Supreme Pontiff, with loud voice and a still wider appeal of love, he roused Christian princes and peoples to undertake a new crusade; and if indeed it was not brought to a successful conclusion, the fault was surely not his.
Source: Doctor Mellifluus (Vatican.va)