Since the tactical efficiency and the _moral_ of the troops are chiefly shown in the offensive, and are then most needful, the necessary conclusion is that safety only lies in offensive warfare. In an attack, the advantage, apart from the elements of moral strength which it brings into play, depends chiefly on rapidity of action. Inasmuch as the attacking party determines the direction of the attack to suit his own plans, he is able at the selected spot to collect a superior force against his surprised opponent. The initiative, which is the privilege of the attacking party, gives a start in time and place which is very profitable in operations and tactics. The attacked party can only equalize this advantage if he has early intimation of the intentions of the assailant, and has time to take measures which hold out promise of success. The more rapidly, therefore, the attacking General strikes his blow and gains his success, and the more capable his troops, the greater is the superiority which the attack in its nature guarantees. This superiority increases with the size of the masses. If the advancing armies are large and unwieldy, and the distances to be covered great, it will be a difficult and tedious task for the defending commander to take proper measures against a surprise attack. On the other hand, the prospects of success of the attacking General will be very favourable, especially if he is in the fortunate position of having better troops at his disposal. Finally, the initiative secures to the numerically weaker a possibility of gaining the victory, even when other conditions are equal, and all the more so the greater the masses engaged. In most cases it is impossible to bring the entire mass of a modern army simultaneously and completely into action. A victory, therefore, in the decisive direction--the direction, that is, which directly cuts the arteries of the opponent--is usually conclusive for the whole course of the war, and its effect is felt in the most distant parts of the field of operations. If the assailant, therefore, can advance in this direction with superior numbers, and can win the day, because the enemy cannot utilize his numerical superiority, there is a possibility of an ultimate victory over the arithmetically stronger army. In conformity to this law, Frederick the Great, through superior tactical capability and striking strength, had always the upper hand of an enemy far more powerful in mere numbers. No further proof is required that the superiority of the attack increases in proportion to the rapidity with which it is delivered, and to the lack of mobility of the hostile forces. Hence the possibility of concealing one's own movements and damaging the effective tactics of the enemy secures an advantage which, though indirect, is yet very appreciable.