De Agricultura

For who else is equally skilful in marshalling and arraying armies, and in distributing them in squadrons, and in appointing captains of regiments and leaders of squadrons, and other commanders of large and small bodies, and in displaying a knowledge of all the other suggestions of tactics and strategy, [*]( Deuteronomy xvii. 15. )

and in explaining the principles of the military art to those who will avail themselves of them skilfully, through the great superabundance of his knowledge of such matters?