François de Callières,
The Practice of Diplomacy
(1919)
“ He must also inform himself exactly of the state of the military forces both on land and sea, of the number and strength of fortified places, whether they are always kept in a high state of efficiency and well supplied with ammunition, of the condition of the sea-ports, of his vessels of war, and of his arsenals, of the number of troops which he can put into the field at once, both of cavalry and of infantry, without stripping his fortresses bare of their garrisons. ”
