The fighting strength of a force may be broadly defined as proportional to the square of its numerical strength multiplied by the fighting value of its individual units.
Aircraft In Warfare, Chapter V (p. 48), Constable & Co. 1916
The fighting strength of a force may be broadly defined as proportional to the square of its numerical strength multiplied by the fighting value of its individual units.
Aircraft In Warfare, Chapter V (p. 48), Constable & Co. 1916