Air forces offered the possibility of striking a the enemy's economic and moral centres without having first to achieve 'the destruction of the enemy's main forces on the battlefield'. Air-power might attain a direct end by indirect means - hopping over opposition instead of overthrowing it.

The more usual reason for adopting a strategy of limited aim is that of awaiting a change in the balance of force ... The essential condition of such a strategy is that the drain on him should be disproportionately greater than on oneself.

The nearer the cutting off point lies to the main force of the enemy, the more immediate the effect; whereas the closer to the strategic base it takes place, the greater the effect.

In should be the duty of every soldier to reflect on the experiences of the past, in the endeavor to discover improvements, in his particular sphere of action, which are practicable in the immediate future.

While there are many causes for which a state goes to war, its fundamental object can be epitomized as that of ensuring the continuance of its policy - in face of the determination of the opposing state to pursue a contrary policy. In the human will lies the source and mainspring of conflict.

The most effective indirect approach is one that lures or startles the opponent into a false move - so that, as in ju-jitsu, his own effort is turned into the lever of his overthrow.

While the nominal strength of a country is represented by its numbers and resources, this muscular development is dependent on the state of its internal organs and nerve-system - upon its stability of control, morale, and supply.