"Considerable anxiety is felt in France due to the present insufficiency of protection on the northeastern frontier, and to the uncertainty as to whether it will be made adequate by the time the troops of occupation in the Rhineland are withdrawn."
The rational use of coast-artillery, and the development of a correct system of defence, are based upon a knowledge of the means of defence, of the capability of those means, and of the method of employing them.
It is almost universally conceded that to-day, as in the past, fortifications play the most important rule in the. defense of coasts and harbors. In the United States, submarine mines and other obstructions are officially regarded as auxiliaries...