Pope Paul VI issued the encyclical Christi Matri Rosarri pleading for worldwide praying of the holy rosary, to be offered especially for peace. The emphasis is mine.
The following is from his holiness' salutation:
To His Venerable Brothers the Patriarchs, Primates, Archbishops, Bishops and other Local Ordinaries in Peace and Communion with the Apostolic See.
Venerable Brothers, Health and Apostolic Benediction.
It is a solemn custom of the faithful during the month of October to weave the prayers of the Rosary into mystical garlands for the Mother of Christ. Following in the footsteps of Our predecessors, We heartily approve this, and We call upon all the sons of the church to offer special devotions to the Most Blessed Virgin this year. For the danger of a more serious and extensive calamity hangs over the human family and has increased, especially in parts of eastern Asia where a bloody and hard-fought war is raging. So We feel most urgently that We must once again do what We can to safeguard peace. We are also disturbed by what We know to be going on in other areas, such as the growing nuclear armaments race, the senseless nationalism, the racism, the obsession for revolution, the separations imposed upon citizens, the nefarious plots, the slaughter of innocent people. All of these can furnish material for the greatest calamity.
