As to the remaining method, which consists in your taking up your position in an entrenched camp, where you need not fight unless you please, and unless you have the advantage, I say that this method commonly affords you no greater facility for avoiding an engagement than the ancients had; nay, that sometimes, owing to the use of artillery, you are worse off than they were. For if the enemy fall suddenly upon you, and have some slight advantage (as may readily be the case from his being on higher ground, or from your works on his arrival being still incomplete so that you are not wholly sheltered by them), forthwith, and without your being able to prevent him, he dislodges you, and you are forced to quit your defences and deliver battle: as happened to the Spaniards at the battle of Ravenna. For having posted themselves between the river Ronco and an earthwork, from their not having carried this work high enough, and from the French having a slight advantage of ground, they were forced by the fire of the latter to quit their entrenchments come to an engagement. But assuming the ground you have chosen for your camp to be, as it always should, higher than that occupied by the enemy, and your works to be complete and sufficient, so that from your position and preparations the enemy dare not attack you, recourse will then be had to the very same methods as were resorted to in ancient times when an army was so posted that it could not be assailed; that is to say, your country will be wasted, cities friendly to you besieged or stormed, and your supplies intercepted; until you are forced, at last, of necessity to quit your camp and to fight a pitched battle, in which, as will presently appear, artillery will be of little service to you. If we consider, therefore, for what ends the Romans made wars, and that attack and not defence was the object of almost all their campaigns, it will be clear, if what I have said be true, that they would have had still greater advantage, and might have achieved their conquests with even greater ease, had artillery been in use in their times.