The art of war (annotated)

"The art of war, as generally considered, consists of five purely military branches,—viz.: Strategy, Grand Tactics, Logistics, Engineering, and Tactics. A sixth and essential branch, hitherto unrecognized, might be termed Diplomacy in its relation to War. Although this branch is more naturally and intimately connected with the profession of a statesman than with that of a soldier, it cannot be denied that, if it be useless to a subordinate general, it is indispensable to every general commanding an army: it enters into all the combinations which may lead to a war, and has a connection with the various operations to be undertaken in this war; and, in this view, it should have a place in a work like this." 

Antoine Henri de Jomini (1779-1869) was one of Napoleon's generals and, later on, one of Russia's most capable advisers. According to some historians, he is one of the founders of modern strategy and his books had been used on military academies over the whole world.