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  • Mortality Rate
    Number of deaths which occur during a given period of time per 1,000 strength. The rate is calculated by dividing the number of deaths which occur during a given period of time by the average strength during the same period and multiplying by 1,000. The time period must be expressed and is usually 1 year.

  • Passive Ballistic Missile Defense
    All defensive measures, other than active defense, taken to minimize the effects of hostile attack by ballistic missiles. These include the use of cover, concealment, camouflage, dispersion, and protective construction. See also ballistic missile defense.

  • Primary Fire Sector
    Principal area to be covered by the gunfire of an individual or unit.

  • Strategic Offensive
    Large-scale offensive action of a nation at war, as opposed to tactical offensive, which refers to a particular operation.