“War is always a matter of doing evil in the hope that good may come of it.”

The unexpected cannot guarantee success, but it guarantees the best chance of success.

The practical value of history is to throw the film of the past through the material projector of the present on to the screen of the future.

If you find your opponent in a strong position costly to force, you should leave him a line of retreat as the quickest way of loosening his resistance. It should, equally, be a principle of policy, especially in war, to provide your opponent with a ladder by which he can climb down.

It is only to clear from history that states rarely keep faith with each other, save in so far (and so long) as their promises seem to them to combine with their interests.

[The] aim is not so much to seek battle as to seek a strategic situation so advantageous that if it does not of itself produce the decision, its continuation by a battle is sure to achieve this. In other words, dislocation is the aim of strategy.

Natural hazards, however formidable, are inherently less dangerous and less uncertain than fighting hazards. All conditions are more calculable, all obstacles more surmountable than those of human resistance.

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.

As has happened so often in history, victory had bred a complacency and fostered an orthodoxy which led to defeat in the next war.

The only thing harder than getting a new idea into the military mind is to get an old one out.

The profoundest truth of war is that the issue of battle is usually decided in the minds of the opposing commanders, not in the bodies of their men.

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.

While hitting one must guard … In order to hit with effect, the enemy must be taken off his guard.

For the spread and endurance of an idea the originator is dependent on the self-development of the receivers and transmitters.

In reality, it si more fruitful to wound than to kill. While the dead man lies still, counting only one man less, the wounded man is a progressive drain upon his side.

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.

Inflict the least possible permanent injury, for the enemy of to-day is the customer of the morrow and the ally of the future

The war with Iraq … had to be one of the greatest non sequiturs in military history. Attacked by a gang composed largely of Islamic militants from Saudi Arabia, the United States countered by invading an unrelated country, and one of the most secular in the Middle East at that.

Inflict the least possible permanent injury, for the enemy of to-day is the customer of the morrow and the ally of the future

It is folly to imagine that the aggressive types, whether individuals or nations, can be bought off … since the payment of danegeld stimulates a demand for more danegeld. But they can be curbed. Their very belief in force makes them more susceptible to the deterrent effect of a formidable opposing force.

The People’s Republic of China has not yet reached the military might of the Soviet Empire. It requires a little more time and a little more infusion of Western aid, loans, technology and the hard currency of our tourists.

Nine years ago on September 14, 2001, I placed the lone vote against the ‘Authorization for Use of Military Force’ – an authorization that I knew would provide a blank check to wage war anywhere, at any time, and for any length.

We must not let history repeat itself in Iraq. The reality is there is no military solution in Iraq. This is a sectarian war with long standing roots that were flamed when we invaded Iraq in 2003. Any lasting solution must be political and take into account respect for the entire Iraqi population.

World military spending has now risen to over $1.2 trillion. This incredible sum represents 2.5 per cent of GDP (global gross domestic product). Even if 1 per cent of it were redirected towards development, the world would be much closer to achieving the Millennium Development Goals.

An army should always be so distributed that its parts can aid each other and combine to produce the maximum possible concentration of force at one place, while the minimum force necessary is used elsewhere to prepare the success of the concentration.