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War & Peace Quote by Karl Von Clausewitz

"Everything in war is very simple, but the simplest thing is difficult"

About this Quote

War flatters planners with a childlike geometry: take the hill, cut the supply line, break the enemy’s will. Clausewitz’s bite is that this apparent simplicity is a trap. The tasks are easy to name because they reduce conflict to verbs. The difficulty arrives the moment real people, weather, fear, bad maps, proud subordinates, and a thinking adversary collide with those verbs. His line compresses an entire worldview: war is not complicated like calculus; it’s difficult like carrying a cup of water through a crowd without spilling. The steps are obvious. The conditions make them treacherous.

The subtext is an argument against the comforting fantasy of the “perfect plan.” Clausewitz wrote in the shadow of the Napoleonic wars, watching Europe learn that mass armies and fast campaigns could shatter old rules overnight. He’s diagnosing what he later calls friction: the accumulation of small mishaps that turns straightforward orders into improvisation. Even the most basic requirement - coordination - becomes precarious when communication breaks, morale wavers, or intelligence is wrong by a mile. The enemy is not a fixed problem; it is a moving, deceptive force actively trying to make your simplest move fail.

The specific intent is practical, almost moral. Clausewitz is warning commanders (and politicians) that war’s danger lies in its apparent clarity. When leaders talk about conflict as if it’s merely a checklist, this sentence waits like a recoil: the checklist is real, and that’s exactly why it’s so easy to underestimate what it costs to execute.

Quote Details

TopicWar
Source
Unverified source: On War (Book 1, Chapter 7: "Friction in War") (Karl Von Clausewitz, 1832)
Text match: 83.33%   Provider: Cross-Reference
Evidence:
Everything is very simple in war, but the simplest thing is difficult. (Book I, Chapter 7 ("Friction in War")). This line is from Carl von Clausewitz’s "Vom Kriege" ("On War"), in the discussion of "friction". The web page shown is the J.J. Graham English translation (published in London in 1873)...
Other candidates (1)
Instrumental in War (Steven Walton, 2005) compilation95.0%
... Carl von Clausewitz's concept of friction . 22 The renowned author of On War described his understanding of milit...
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Citation Formats

APA Style (7th ed.)
Clausewitz, Karl Von. (2026, March 1). Everything in war is very simple, but the simplest thing is difficult. FixQuotes. https://fixquotes.com/quotes/everything-in-war-is-very-simple-but-the-simplest-32287/

Chicago Style
Clausewitz, Karl Von. "Everything in war is very simple, but the simplest thing is difficult." FixQuotes. March 1, 2026. https://fixquotes.com/quotes/everything-in-war-is-very-simple-but-the-simplest-32287/.

MLA Style (9th ed.)
"Everything in war is very simple, but the simplest thing is difficult." FixQuotes, 1 Mar. 2026, https://fixquotes.com/quotes/everything-in-war-is-very-simple-but-the-simplest-32287/. Accessed 5 Mar. 2026.

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Everything in War is Simple - Karl Von Clausewitz
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About the Author

Karl Von Clausewitz (June 1, 1780 - November 16, 1831) was a Soldier.

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