Meminisse Iuvat §2

² Thus, when the world was rocked by a terrible war, We did not simply preach peace to citizens, peoples, and nations, nor did We merely work to restore to mutual agreement - under the standard of truth, justice, and love - those whom strife had divided. On the contrary, when all human resources and human plans proved ineffective, in many letters of exhortation and in a holy crusade of prayer We invoked heaven's help through the mighty intercession of the great Mother of God, to whose Immaculate Heart We consecrated Ourselves and the whole human race.