This post is part of the Principles of War series. See the introductory post or browse all posts with the principles of war tag.
In the conduct of war as a whole and in every operation of war it is essential to select and clearly define the aim. The ultimate aim is to break the enemy’s will to fight. Each phase of the war and each separate operation must be directed towards this supreme aim, but will have a more limited aim, which must be clearly defined, simple and direct. Once the aim is decided, all efforts must be directed to its attainment until a changed situation calls for a re-appreciation and consequently a new aim. Every plan or action must be tested by its bearing on the chosen aim.
The Selection and Maintenance of the Aim must be regarded as the “Master” Principle. It has therefore been placed first. The remaining principles are not given in any particular order, since their relative importance will vary according to the nature of the operation in question.

Comments to this entry
tdaxp » Blog Archive » 5GW / xGW around the blogosphere
May 22, 2008
3:49 am
Younghusband
May 22, 2008
7:53 pm
Depending on the time and the war, the "ultimate aim" may change, however the conduct of war still requires an aim or goal, possibly even moreso in this age of democracy and mass media.
purpleslog
May 22, 2008
11:18 pm
This sounds like a possible "means", not an "ends" to me.
The aim/ends of war is get your adversary to do something they would not otherwise do.
Ralph Hitchens
May 23, 2008
1:27 pm
Michael
May 24, 2008
3:53 am
That said, it's always possible for an entity to have more ends than are revealed--all of which effect the means being used.
purpleslog
May 24, 2008
5:24 pm
1) broken the will of the enemy to fight (the principle of the post)
2) broken the enemy’s capability to fight (mentioned in your comment)
Then what?
There is a something else comes next. That something else is the aim.
BTW, points (1) and (2) above are not the same thing.
Joe Jones
May 27, 2008
2:03 am
I'm not saying you can't eliminate an enemy's capability to, say, project naval power or nuke a continent. That's obviously doable. But a person with sufficient will can fight to the death, regardless of which weapons you take away, and in this age they have more and more insidious ways to do so. I think that supports the general notion that you want to break their will, not their capability (keeping in mind that breaking capability can be an important step in breaking will).
Oliver
May 27, 2008
2:03 pm
Will, as a mental ability, is in principle outside external influence. If the enemy does not wish to give up, you will have to go to elimination.
Michael
May 27, 2008
11:26 pm
Joe Jones
May 28, 2008
3:39 am
If only it were...
Oliver
May 28, 2008
3:59 pm