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Since pastoral needs require more and more that some pastoral undertakings be directed and carried forward as joint projects, it is fitting that certain offices be created for the service of all or many dioceses of a determined region or nation. These offices can be filled by bishops.
Christus Dominus 42 says it. Number 43 continues by strongly suggesting a military vicariate in each nation, if possible.
Both the military vicar and the chaplains should devote themselves unsparingly to this difficult work in complete cooperation with the diocesan bishops. Diocesan bishops should release to the military vicar a sufficient number of priests who are qualified for this serious work. At the same time they should promote all endeavors which will improve the spiritual welfare of military personnel.
Even a pacifist agrees this is a necessary ministry.