WorkCarl von Clausewitz

On War

Published by his widow from a manuscript he never finished, the treatise that ties every war to the political purpose it serves.

by Carl von Clausewitz2,479 passages held

  • German, the original language
  • English, a translation held here, and your language
Original title
Vom Kriege
First published
(published posthumously)
Original language
German

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Overview

In March 1831 Carl von Clausewitz was sent east to the Polish border as chief of staff to Field Marshal Gneisenau. By then he had sealed the manuscript he had been writing since about 1816, and he never opened it again. He died of cholera in Breslau in November 1831, having written in a note that he considered only the first chapter of Book One finished. His widow, Marie von Clausewitz, published the eight books as they stood, in three volumes between 1832 and 1834. The book's central claim is that war belongs to politics: it continues a state's political dealings by other means, so every campaign has to be judged by the political purpose it serves, and that purpose sets how far the fighting should go. The military theorists of his day had hoped for rules. The Prussian writer Heinrich von Bülow reduced strategy to the geometry of an army's supply base; the Swiss theorist Antoine-Henri Jomini built his on interior lines. Clausewitz answered that war is fought in danger and exhaustion, on reports that are mostly contradictory or false, and he called the sum of these drags on action friction. J. J. Graham's English translation appeared in London in 1873, and in 1876 the Allgemeine Deutsche Biographie, the German national biographical dictionary, credited Prussia's campaigns of 1866 and 1870–71, directed by Helmuth von Moltke, to Clausewitz's way of thinking. Lenin worked through the book in Swiss exile in 1915, and the 1976 translation by Michael Howard and Peter Paret became the standard English text.

Key concepts

What does Clausewitz mean by calling war a continuation of politics?

That war is not a separate realm with purposes of its own. It continues a state's political dealings by other means, so the reasons for fighting come from politics and never from the fighting itself. For On War this is the central claim: every campaign is to be judged by the political purpose it serves, not by the standards of the battlefield alone.

How can a political purpose decide how far a war should go?

Because the purpose is the measure of the effort. What a state wants from a war sets how much force it should spend and how far it should carry the fighting; the fighting has no measure of its own. On War therefore judges a campaign not by what it achieved on the field alone, but by whether it served the end it was waged for.

What is friction in On War?

Friction is Clausewitz's name for the sum of everything that drags on action in war. War is fought in danger and exhaustion, on reports that are mostly contradictory or false, and each of these makes the simple thing hard to do. The word explains why war as it is fought differs from war as it is planned, and why no set of rules can close that gap.

Why did Clausewitz reject the rule-based theories of Bülow and Jomini?

Because they promised rules where war allows none. Heinrich von Bülow had reduced strategy to the geometry of an army's supply base, and Antoine-Henri Jomini built his on interior lines. Clausewitz answered that such systems leave out the conditions in which war is actually fought: danger, exhaustion and unreliable information. A theory of war has to begin from those, not from diagrams.

Themes of the book

What this book returns to, gathered into themes and ordered by how much of the text each one occupies.

War Answerable to Its Political Purpose

What is a war for, and who decides how far it goes? Clausewitz's answer is that the fighting takes its measure from the political purpose it serves, never from itself.

War, on this account, continues a state's political dealings by other means, so no campaign can be judged by its own standards. Its measure is the political purpose it serves, and that purpose decides how far the fighting should go. The conduct of war is thereby made answerable to politics rather than to the soldier's craft alone. Clausewitz considered only the first chapter of Book One finished when he sealed the manuscript, yet this is the central claim of all eight books.

  • war
  • warfare
  • military theory
  • military strategy
  • strategy
  • victory

Friction: Why War Defeats Its Rulebooks

Can war be reduced to rules at all? Against theorists who promised geometry, Clausewitz set the danger, exhaustion and false reports under which every decision is actually made.

Heinrich von Bülow had reduced strategy to the geometry of an army's supply base, and Antoine-Henri Jomini built his on interior lines. Clausewitz objected not to one rule or another but to the hope of rules at all. War is fought in danger and exhaustion, on reports that are mostly contradictory or false, and he named the sum of these drags on action friction. A theory that leaves them out describes a war nobody has ever fought.

  • uncertainty
  • risk
  • judgment
  • decision-making
  • courage
  • morale
  • theory and practice
  • military leadership
  • leadership

Within this work

passages held
2,479
distinct concepts
1,102
by passages held, corpus-wide
#17

What this book thinks together

The wheel takes this book’s leading concepts and shows how often they come up together. The wider the band between two, the more of its passages speak of both. Among them, most often together: “defense” and “military strategy”.
Concept co-occurrence, strongest first 8 concepts, joined by 28 pairings. 84 pairings reach beyond these concepts and are not drawn.
ConceptPaired conceptShared passages
defensemilitary strategy345
military strategyterrain205
decision-makingmilitary strategy96
military strategymorale96
defenseterrain87
military logisticsmilitary strategy69
military strategywar58
military strategymilitary theory27
military logisticswar22
defensemilitary logistics20
defensemilitary theory15
decision-makingdefense12
decision-makingwar12
defensewar12
military theorywar11
moralewar11
defensemorale9
military logisticsterrain9
military theorymorale8
military theoryterrain8
decision-makingterrain6
decision-makingmorale5
military logisticsmorale5
decision-makingmilitary logistics4
moraleterrain4
decision-makingmilitary theory3
terrainwar3
military logisticsmilitary theory2

Works held

The author's work in order, this book marked in place. Your-language title first, the original beneath it where the two differ; side chips show which full texts are held.

  1. 1812 Political Declaration (Bekenntnisdenkschrift)

    Its plan for a people's rising returns in the chapter of On War on arming the people; the memorandum itself is a manifesto rather than theory, and it ends by predicting that every future war would be fought as a national cause.

    DE
  2. 1832 On War (Vom Kriege) you are here DEEN
  3. 1834 Principles of War (Die wichtigsten Grundsätze des Kriegführens)

    Written for a royal pupil at the end of two years of lessons, it states briefly ideas that On War later works out at length.

    DE
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