Royal Army College

Lesson Overview

There are two broad ways to defeat an opponent in war, and the difference between them runs through the whole history of the subject and matters greatly to how a force fights. One way is to wear the opponent down by destroying their strength until they can no longer resist: attrition. The other is to defeat the opponent's will and cohesion, to unbalance and paralyse them so they cannot use their strength effectively, by speed, surprise, and striking at what holds them together: manoeuvre. The principles lessons taught what makes any military action sound; this lesson teaches the two broad approaches those principles can serve, and why the choice between them matters, especially for a small force. It matters because an officer should understand that there is more than one way to prevail, that the two approaches make very different demands and suit very different forces, and above all that for a small, lightly armed force the manoeuvrist approach, defeating an opponent by wit rather than mass, is far better suited than a contest of attrition it could never win. For the Royal Kaharagian Army, small and unable to win by weight of numbers, this is not abstract theory but the heart of how such a force could ever prevail against a stronger one. This lesson teaches the two approaches: attrition and its logic, manoeuvre and its logic, and why the manoeuvrist approach suits a small force. As with the rest of the course, this builds the officer's understanding and judgement through study.

The lesson takes the two approaches in three parts. First, attrition, the approach of wearing down: defeating an opponent by destroying their strength until they can no longer resist, its logic, and the demands it makes, above all the mass and resources to outlast the opponent. Second, manoeuvre, the approach of unbalancing: defeating an opponent's will and cohesion rather than destroying their mass, by speed, surprise, tempo, and striking at what holds them together, so they cannot use their strength, and its connection to the principles and to mission command. Third, why the manoeuvrist approach suits a small force: that a small, lightly armed force cannot win a contest of attrition against a stronger opponent but can hope to prevail by manoeuvre, wit, and the defeat of the opponent's cohesion, which is why the manoeuvrist approach is the natural one for such a force. Throughout, the lesson holds that there are two broad ways to prevail, that they make very different demands, and that for a small force the manoeuvrist approach of defeating the opponent's will and cohesion is far better suited than a contest of mass it could never win.

By the end you will be able to explain the two broad approaches of attrition and manoeuvre and the logic of each; describe attrition as the wearing down of an opponent's strength and the demands it makes; describe manoeuvre as the defeat of an opponent's will and cohesion by speed, surprise, and striking at what holds them together; explain why the manoeuvrist approach suits a small, lightly armed force; and explain why this matters for how the Royal Kaharagian Army would fight.

Key Terms

The two approaches: the two broad ways to defeat an opponent in war, attrition (wearing down their strength) and manoeuvre (defeating their will and cohesion), which make very different demands.
Attrition: the approach of defeating an opponent by destroying their strength, their forces, materiel, and means, until they can no longer resist; a contest of endurance and mass.
Manoeuvre (the manoeuvrist approach): the approach of defeating an opponent's will and cohesion rather than destroying their mass, by speed, surprise, tempo, and striking at what holds them together, so they cannot use their strength effectively.
Will and cohesion: what holds an opposing force together and able to act, its morale, command, organisation, and coherence, which the manoeuvrist approach attacks rather than the opponent's mass.
Tempo: the speed and rhythm of action, by which a manoeuvrist force acts faster than the opponent can respond, keeping them off balance and unable to react in time.
Unbalancing and paralysing: the manoeuvrist aim of throwing the opponent off balance and paralysing their ability to act effectively, so their strength cannot be brought to bear.
The demands of attrition: what the attrition approach requires, above all the mass, resources, and endurance to outlast the opponent, which a small force does not have.
Defeating by wit, not mass: the small force's path to prevailing, using manoeuvre, surprise, and the defeat of the opponent's cohesion rather than a weight of numbers it lacks.
The approach for a small force: the recognition that the manoeuvrist approach is the natural and necessary one for a small, lightly armed force that cannot win a contest of attrition.
The principles serve either approach: the truth that the principles of war can serve attrition or manoeuvre, but that surprise, flexibility, and concentration at the decisive point especially serve the manoeuvrist approach.

Attrition: the approach of wearing down

The lesson begins with the first and more straightforward of the two approaches: attrition. To defeat an opponent by attrition is to destroy their strength, their forces, their materiel, their means to fight, steadily wearing them down until they can no longer resist, and so prevailing by the destruction of the opponent's capacity to continue. The logic is direct: war is a contest of strength, and the side that destroys enough of the other's strength, faster than its own is destroyed, wins, because in the end the worn-down side can no longer fight. Attrition does not seek primarily to outwit the opponent but to outlast and outgrind them, to win the contest of destruction. Much of the history of war shows this approach, the grinding campaigns in which each side wears at the other's strength until one can bear it no longer, and it is a real and sometimes decisive way to win.

But attrition makes heavy demands, and understanding them is the key to the lesson, because they are exactly the demands a small force cannot meet. To win by attrition, a force must be able to destroy the opponent's strength faster than its own is destroyed, and to outlast the opponent in the grinding contest, which requires mass, resources, and endurance: the numbers, the materiel, the depth of means to absorb losses and keep destroying the opponent's strength until they break. A force that chooses attrition is betting that it can outlast the opponent in a contest of destruction, and that bet can only be made by a force with the mass and resources to win it. A weaker force that lets itself be drawn into a contest of attrition against a stronger one is choosing the contest it is most certain to lose, because the stronger force can destroy its strength faster and outlast it. This is the central limitation of the attrition approach for a small force: it is the approach of the strong, the side with the mass and resources to win a grinding contest of destruction, and it is precisely the wrong approach for the weak, who cannot win such a contest and must not be drawn into one. So attrition is a real approach with a clear logic, prevailing by wearing the opponent down, but it demands the mass and endurance to win the contest of destruction, which makes it the approach of the stronger force and the trap of the weaker. The other approach, which the weaker force needs, is manoeuvre.

   ATTRITION: THE APPROACH OF WEARING DOWN

   defeat the opponent by DESTROYING THEIR STRENGTH (forces, materiel,
   means) until they can no longer resist -> prevail by destruction of
   their CAPACITY to continue.
   LOGIC: war as a contest of strength; destroy enough of theirs, faster
   than yours is destroyed, and the worn-down side can no longer fight.
   (not to OUTWIT but to OUTLAST + OUTGRIND -- much of war's history)

   THE DEMANDS (the key point):
     to win by attrition you must destroy theirs faster than yours, and
     OUTLAST them -> requires MASS, RESOURCES, ENDURANCE (numbers,
     materiel, depth to absorb losses + keep grinding)
   -> the approach of the STRONG.
   a WEAKER force drawn into attrition vs a stronger one chooses the
   contest it is MOST CERTAIN TO LOSE.
   -> the trap of the weak; they need the OTHER approach: MANOEUVRE.

Manoeuvre: the approach of unbalancing

The second approach defeats the opponent in a wholly different way, and it is the heart of this lesson for a small force. To defeat an opponent by manoeuvre, the manoeuvrist approach, is not to destroy their strength but to defeat their will and cohesion: to unbalance and paralyse them so that they cannot use their strength effectively, by speed, surprise, tempo, and striking at what holds them together, rather than by grinding down their mass. The logic is different from attrition's: instead of asking "how do I destroy enough of the opponent's strength to leave them unable to fight," the manoeuvrist asks "how do I defeat the opponent's will and cohesion so that their strength, however great, cannot be effectively used." A force whose command is paralysed, whose organisation is thrown into confusion, whose morale and coherence are broken, cannot bring its strength to bear, even if that strength is largely intact, and so can be defeated by a force that never matched its mass. Manoeuvre seeks to win by outwitting and unbalancing the opponent rather than by outlasting them in destruction.

The means of the manoeuvrist approach are speed, surprise, tempo, and striking at what holds the opponent together. Speed and tempo, acting faster than the opponent can respond, keep them off balance and unable to react in time, so that the manoeuvrist force is always a step ahead and the opponent is always reacting too late, which paralyses their ability to act effectively. Surprise, striking where and when the opponent does not expect, throws them off balance and achieves disproportionate effect, as the principle of surprise the course taught makes plain. And striking at what holds the opponent together, their command, their cohesion, their organisation, the things that let their strength be used, rather than at the mass of their strength itself, attacks the opponent where they are decisive rather than where they are strong. The aim throughout is to unbalance and paralyse: to throw the opponent off balance and keep them there, so their strength cannot be brought to bear, and to defeat their will and coherence so they cannot or will not continue. This approach is deeply connected to the principles of war and to mission command. It draws above all on surprise, flexibility, and the concentration of strength at the decisive point that the principles teach, and it depends on the speed of decision and the decentralised initiative that mission command, taught in the command course, provides, because a force can only act faster than the opponent and exploit fleeting opportunity if its subordinates can decide and act on their own judgement within the commander's intent. The manoeuvrist approach is, in this sense, the way of fighting that mission command exists to enable. So manoeuvre is the approach of defeating the opponent's will and cohesion by speed, surprise, tempo, and striking at what holds them together, prevailing by wit and unbalancing rather than by the destruction of mass, and it is the approach a force uses when it would defeat an opponent it cannot simply outgrind.

   MANOEUVRE: THE APPROACH OF UNBALANCING

   defeat the opponent's WILL + COHESION (not their mass): UNBALANCE +
   PARALYSE them so they cannot USE their strength effectively.
   LOGIC: not "destroy enough of their strength" but "defeat their will +
   cohesion so their strength, however great, can't be brought to bear."
   (a force whose command is paralysed + coherence broken can't use even
   intact strength -> defeated by a force that never matched its mass)

   THE MEANS:
     SPEED + TEMPO -- act faster than they can respond; always a step
        ahead, they always react too late -> paralysed
     SURPRISE -- strike where/when unexpected; throw off balance,
        disproportionate effect (the principle of surprise)
     STRIKE AT WHAT HOLDS THEM TOGETHER -- command, cohesion, organisation
        (where decisive), not the mass of strength (where strong)

   draws on SURPRISE, FLEXIBILITY, CONCENTRATION at the decisive point;
   depends on MISSION COMMAND (speed of decision + decentralised initiative).
   -> the way of fighting mission command exists to enable.

Why the manoeuvrist approach suits a small force

The lesson now draws the two approaches together into the point that matters most for the Royal Kaharagian Army: the manoeuvrist approach is far better suited to a small, lightly armed force than a contest of attrition it could never win. The reasoning follows directly from the two approaches. Attrition demands mass, resources, and endurance to outlast the opponent in a contest of destruction, which a small force does not have; a small, lightly armed force drawn into a grinding contest of attrition against a stronger opponent is in the contest it is most certain to lose, because the stronger force can destroy its strength faster and outlast it. So attrition is not a path to victory for the weak; it is the path to their certain defeat. Manoeuvre, by contrast, offers the weaker force a way to prevail, because it does not depend on matching the opponent's mass. A small force that is fast, agile, surprising, and able to strike at the opponent's cohesion can unbalance and paralyse a larger force, defeating its will and coherence so its greater strength cannot be effectively used, and so prevail by wit where it could never prevail by weight. The manoeuvrist approach is the approach by which the smaller, cleverer, faster force defeats the larger, slower one, which is exactly the position a small force is in.

This is why the manoeuvrist approach is the natural and necessary one for a small force, and it is far from abstract for the Royal Kaharagian Army. The Army is small and lightly armed, unable to win by weight of numbers or materiel, and the course has stressed throughout that such a force cannot win by mass. If a small force could only ever fight by attrition, it could only ever lose to a stronger opponent; the manoeuvrist approach is the heart of how such a force could prevail against a stronger one at all, by defeating the opponent's will and cohesion through speed, surprise, agility, and the striking at what holds the opponent together, rather than by a contest of destruction it cannot win. This connects directly to the small-force adaptation the course teaches and to the mission command of the command course: a small force prevails, when it can, by being faster, more agile, more surprising, and better able to use the initiative of its people than the larger opponent, which is the manoeuvrist way enabled by mission command. The officer of this Army should therefore understand the two approaches and grasp which is theirs: not the attrition that demands a mass the Army does not have and would draw it into a losing contest, but the manoeuvre that lets a small, agile, well-led force defeat an opponent's will and cohesion and so prevail by wit rather than weight. This understanding is not a tactic to be applied mechanically but a way of thinking about how such a force could ever fight a stronger one and win, and it shapes how the officer studies war (attending to how weaker forces have prevailed by manoeuvre over stronger ones) and how they would conduct operations (seeking to be fast, agile, and surprising, and to strike at the opponent's cohesion, rather than to grind). So the two approaches, attrition and manoeuvre, are the two broad ways to prevail in war, making very different demands and suiting very different forces, and for the small, lightly armed Royal Kaharagian Army the manoeuvrist approach of defeating the opponent's will and cohesion is far better suited than the attrition it could never win, which is the heart of this lesson and of how such a force could hope to prevail.

In Practice: The Small Force's Way to Prevail

An officer of the Royal Kaharagian Army considers how their small, lightly armed force could ever prevail against a stronger opponent, and the two approaches this lesson teaches give them the answer. They understand the two ways to defeat an opponent: attrition, wearing the opponent down by destroying their strength until they cannot resist, and manoeuvre, defeating the opponent's will and cohesion by speed, surprise, and striking at what holds them together, so the opponent cannot use their strength. And they grasp at once which is theirs. Attrition demands the mass, resources, and endurance to outlast the opponent in a contest of destruction, which their small force does not have; were the Army drawn into a grinding contest of attrition against a stronger opponent, it would be in the contest it is most certain to lose. So the officer knows that attrition is not their path, and that the gravest error would be to let their small force be drawn into a contest of mass it could never win.

Their path is manoeuvre. The officer thinks about how their small force could prevail by wit rather than weight: by being faster than the opponent and acting at a tempo the opponent cannot match, so the opponent is always reacting too late; by surprise, striking where and when the opponent does not expect; by agility and the initiative of well-led people who can act on the commander's intent without waiting for orders, the mission command the command course teaches; and by striking at what holds the opponent together, their command and cohesion, rather than at the mass of their strength. The aim is to unbalance and paralyse the opponent so that their greater strength cannot be brought to bear, and so to defeat their will and coherence, which a small, agile, surprising force can do to a larger, slower one. This understanding also shapes how the officer studies war: they attend especially to how weaker forces have prevailed over stronger ones by manoeuvre, drawing the lessons their own Army most needs.

The value is an officer who understands how a small force could actually fight a stronger one and win, rather than one who would lead it to certain defeat in a contest of attrition. Because they grasped the two approaches and which suits their force, they would seek to make their Army fast, agile, surprising, and able to strike at an opponent's cohesion, prevailing by wit, rather than draw it into the grinding destruction it could never survive. Another officer who knew only one way to fight, the destruction of the opponent's strength, would lead a small force into the attrition that is the trap of the weak. This officer understood that there are two approaches, that they suit very different forces, and that for a small, lightly armed force the manoeuvrist approach of defeating the opponent's will and cohesion is far better suited than the attrition it could never win, which is the heart of this lesson and of how the Royal Kaharagian Army could hope to prevail.

Check Your Understanding

Explain the two broad approaches to defeating an opponent, attrition and manoeuvre, and the different logic of each. Why does attrition demand mass, resources, and endurance, and why is it "the approach of the strong"?
Describe the manoeuvrist approach: defeating the opponent's will and cohesion rather than their mass, by speed, surprise, tempo, and striking at what holds them together. How does it connect to the principles of war and to mission command?
Explain why the manoeuvrist approach suits a small, lightly armed force, and why such a force must not be drawn into a contest of attrition. Why is this "the heart of how such a force could prevail against a stronger one," and how does it shape how the officer studies war and would conduct operations?

Reflection (write a short paragraph): This lesson teaches that there are two broad ways to prevail in war, wearing the opponent down by attrition or defeating their will and cohesion by manoeuvre, and that for a small, lightly armed force the manoeuvrist approach of wit, speed, and surprise is far better suited than a contest of mass it could never win. Think about why a small force drawn into attrition is in the contest it is most certain to lose, and why prevailing by unbalancing an opponent rather than outgrinding them is the small force's real path. How does understanding the two approaches change the way you would study war and think about how the Royal Kaharagian Army could ever fight a stronger opponent and win?

Summary

There are two broad ways to defeat an opponent in war, making very different demands and suiting very different forces: attrition (wearing down the opponent's strength until they cannot resist) and manoeuvre (defeating the opponent's will and cohesion so they cannot use their strength).
Attrition defeats the opponent by destroying their strength, forces, materiel, and means, faster than one's own is destroyed, prevailing by outlasting and outgrinding them. It demands mass, resources, and endurance to win the contest of destruction, which makes it the approach of the strong and the trap of the weak: a weaker force drawn into attrition against a stronger one chooses the contest it is most certain to lose.
Manoeuvre defeats the opponent's will and cohesion rather than their mass, unbalancing and paralysing them by speed and tempo (acting faster than they can respond), surprise (striking where unexpected), and striking at what holds them together (command, cohesion, organisation) rather than at the mass of their strength, so that even intact strength cannot be brought to bear. It draws on surprise, flexibility, and concentration at the decisive point, and depends on the speed of decision and decentralised initiative of mission command.
The manoeuvrist approach is far better suited to a small, lightly armed force than attrition: such a force cannot win a contest of destruction against a stronger opponent and must not be drawn into one, but can hope to prevail by wit, speed, surprise, agility, and the defeat of the opponent's cohesion. This is the heart of how a small force could prevail against a stronger one at all, connecting to the small-force adaptation of the principles and to mission command.
For the Royal Kaharagian Army, small and unable to win by mass, this is not abstract theory but the way of thinking about how it could ever fight a stronger opponent and win, and it shapes how the officer studies war (attending to how weaker forces prevailed by manoeuvre) and would conduct operations (seeking to be fast, agile, and surprising, and to strike at an opponent's cohesion).
This builds the officer's understanding and judgement through study, the aim of the whole course.
Cross-references: draws on the principles of war (Lessons 03 and 04), above all surprise, flexibility, and concentration; applies at the levels of war (Lesson 08); is the approach the small-force adaptation of Lesson 07 points toward; depends on the mission command and tempo of Command, Mission Command, and Decision-Making (LDR 410); and is studied through the campaigns of weaker forces prevailing over stronger ones as Lesson 05 teaches, serving the officer's lifelong study of war that the capstone (Lesson 10) charges.

Manoeuvre and Attrition: Approaches to War