What is Warfare?
Warfare, in the modern sense means "state of war, campaigning, being engaged in war," although originally the word denoted a military expedition. The art of warfare, or waging war, consists of the five military branches of strategy, grand tactics, logistics, engineering, and tactics. Strategy (Gr. stratia, " campaign," and hegesmai, " lead "; " the conduct of a campaign ") is the "art of properly directing masses upon the theater of war, either for defense or for invasion." Grand tactics is the "art of making good combinations preliminary to battles, as well as during their progress." Logistics is the "art of moving armies"; engineering is the science of "the attack and defense of fortifications"; tactics is the "art of disposing military or naval forces, especially in actual contact with the enemy."