segunda-feira, 23 de março de 2026

What Master of War Say About the U.S.-Israel War in Iran? If Clausewitz were alive today - John Spencer

What Master of War Say About the U.S.-Israel War in Iran?

John Spencer
@SpencerGuard

If Carl von Clausewitz were alive today, watching the U.S.-Israel war in Iran unfold, he would not begin with a slogan or a theory fashionable for one news cycle. He would begin where he always insisted serious analysis must begin, with critical examination grounded in facts, traced through causes, and judged against political purpose.
That is why Clausewitz, the 19th-century Prussian soldier, adviser, and military theorist, remains the master of masters.
He is not the greatest military thinker because he gave the world a checklist. He is the greatest because he gave us something far more enduring. He gave us theories that have stood the test of time and are taught in military colleges around the world. More importantly, he gave us the analytical tools to understand, study, and evaluate any war.
Clausewitz did not seek to simplify war. He sought to discipline how we think about it.
In On War, he did not offer formulas that could mechanically produce victory. He offered a framework, a method, a way to move from facts, to causes, to judgment. He understood that war is never reducible to tidy maxims detached from context. He warned against the intellectual temptation that still seduces analysts today: to invent clever models, neat escalation ladders, or fashionable syntheses of terrorism, insurgency, revolutionary warfare, and interstate conflict, and then present them as universal explanations. Much of that work collapses under rigorous historical scrutiny when the full context is applied.
Clausewitz would have had little patience for theories that collapse fundamentally different types of war into a single framework, or for analyses built on selectively chosen evidence rather than complete historical context. He would not begin with models. He would begin with disciplined inquiry.
He called this critical examination, and he outlined clear steps to critical analysis that remain unmatched in rigor. He distinguished analysis from narrative history, which merely arranges facts. Narrative describes. Critical examination explains.
He identified three intellectual activities. First, the discovery and interpretation of facts. Second, the tracing of effects back to their causes. Third, the investigation and evaluation of the means employed. Together, these form his method of critical inquiry.
Clausewitz developed this method to study past campaigns, but it is not limited to history. It is a way to analyze any war, including one still unfolding.
But he would also issue a warning. War is the realm of uncertainty. “Three quarters of the factors on which action in war is based are wrapped in a fog of greater or lesser uncertainty.”
That is not a rhetorical flourish. It is a constraint on analysis.
In a past war, facts can be assembled and outcomes are known. In a current war, much of what appears known is incomplete, distorted, or wrong. Intelligence is partial. Reporting is selective. Both sides shape narratives. Clausewitz would insist on intellectual humility.
But that does not make analysis impossible. It makes disciplined analysis essential. And it begins where Clausewitz always begins: with politics.
War, he wrote, has its own grammar, but not its own logic. Its logic comes from politics. Before asking whether a strike was tactically brilliant or whether escalation is likely, one must first ask: what is the political object?
Clausewitz would go directly to the words of the political leadership, because war cannot be understood apart from the policy that drives it.
On March 1, President Trump stated:
“The United States military is undertaking a massive and ongoing operation to prevent this radical dictatorship from threatening America and our core national security interests. We are going to destroy their missiles and raze their missile industry to the ground. It will again be obliterated. We are going to annihilate their navy. We are going to ensure that the regime’s terrorist proxies can no longer destabilize the region or the world and attack our forces… And we will ensure that Iran does not obtain a nuclear weapon. It is a very simple message: they will never have a nuclear weapon.”
On March 20, the president stated:
“We are getting very close to meeting our objectives as we consider winding down our great Military efforts in the Middle East with respect to the Terrorist Regime of Iran: (1) Completely degrading Iranian Missile Capability, Launchers, and everything else pertaining to them. (2) Destroying Iran’s Defense Industrial Base. (3) Eliminating their Navy and Air Force, including Anti-Aircraft Weaponry. (4) Never allowing Iran to get even close to Nuclear Capability, and always being in a position where the U.S.A. can quickly and powerfully react to such a situation, should it take place. (5) Protecting, at the highest level, our Middle Eastern Allies…”
Recent statements from President Trump reinforce this limited scope while introducing ambiguity. In different interviews and speeches, he described the campaign as nearing completion, saying there is “practically nothing left to target,” that “the war will end soon,” and that “Iran's navy, air force, and communications are gone.” At the same time, he dismissed ceasefires and warned that any Iranian attempt to close the Strait of Hormuz would trigger a far harsher U.S. response, “twenty times harder.” On March 20, he told an audience that Iranian leaders are “all gone” and that the war is going “extremely well.”
For Clausewitz, these are not contradictions but signals. The political object remains the destruction of coercive capabilities and nuclear denial, not unlimited regime overthrow, though success breeds temptation to expand aims and tests the alignment between policy and military means.
That distinction matters. A limited war does not mean a low-intensity war. A war can be extraordinarily violent and still limited if the political objective is limited. The 1991 Gulf War was limited because its object was the liberation of Kuwait. The 2003 Iraq War was unlimited because its object was to overthrow the regime.
Clausewitz offers this not as a label, but as a way to think. It forces us to identify what truly holds the enemy system together and where force should be applied to compel the enemy to do our will. He called this the center of gravity.
In any war, the center of gravity is the source of strength that provides cohesion and direction. It is the point against which all energies should be directed. It is not fixed. It depends on the nature of the war. It may be the army, the capital, the leadership, an alliance, or in some cases, the people themselves.
Seen this way, the Iraq War illustrates how it can change. In 2003, when the objective was to overthrow Saddam’s regime, the capital and regime leadership functioned as the center of gravity. But when the objective shifted to rebuilding the state, the nature of the war changed, and the center of gravity shifted toward the population.
In this war, the opening campaign suggests that the United States and Israel assessed the regime’s leadership, command networks, missile forces, defense industrial base, and coercive apparatus as central to its power. The strikes targeted not only physical capabilities, but the regime’s ability to think, decide, coordinate, and act.
Clausewitz could not have imagined the technologies used to do this. But that does not make his theory obsolete. It makes it more relevant than ever.
War remains a contest of wills. What has changed is how directly modern capabilities can strike the sources of that will.
Clausewitz demands that we trace effects to causes on both sides. From Iran’s perspective, the war is an existential defense against aggression, with the new leadership under Mojtaba Khamenei framing resistance as a long-term effort, including vows to rebuild missile capabilities, threats against tourism sites worldwide, and continued proxy coordination. This dynamic may harden the regime’s cohesion rather than fracture it, shifting potential centers of gravity toward asymmetric endurance, an element the current campaign has not fully targeted.
He would also recognize something enduring: the principles of concentration and speed. To act with the utmost concentration and the utmost speed is to strike decisive points before the enemy can recover coherence. It is not about mass alone. It is about focused, intelligent force applied at the right time and place.
But Clausewitz would also issue a warning. Those who believe an enemy can be defeated without cost misunderstand the nature of war. If the political objective is worth fighting for, the enemy will resist.
Clausewitz warned that the greatest danger often follows success. Success in battle does not equal success in war. This is where Clausewitz’s concept of the culminating point becomes essential.
The culminating point of the attack is reached when continued offensive action no longer produces advantage and begins to increase risk. Napoleon’s invasion of Russia is the classic example. What began as a campaign of momentum became an overextended offensive where distance, attrition, and resistance reversed the balance.
The culminating point of victory is more dangerous still. It is the point at which success itself begins to undermine the political objective. Napoleon in Russia crossed it. In Korea, the United States approached it when UN forces advanced to the Yalu, a move that precipitated Chinese intervention and transformed battlefield success into a wider and more dangerous war.
The culminating point of the attack looms as a live risk. By March 20, the U.S.-Israeli campaign has inflicted extraordinary damage, with thousands of strikes degrading missiles, naval forces, air defenses, and leadership, including the death of Supreme Leader Ali Khamenei on February 28 and the rapid installation of his son Mojtaba as successor. Yet success has provoked broader effects. In mid-March, Israeli strikes on energy infrastructure at South Pars triggered a higher level of Iranian missile retaliation, including attacks on Qatar and Israel’s critical energy infrastructure, spiking global energy risk and price volatility. U.S. forces have intensified operations in the Strait of Hormuz to counter Iranian threats and disruptions, while President Trump has rejected ceasefires despite rhetoric about “winding down.”
Clausewitz would ask whether the campaign's momentum risks approaching a culminating point, where further offensive action might begin to generate increasing friction, resistance, and costs that no longer clearly advance the declared political object. Indicators such as the escalation of energy disruptions following mid-March strikes on infrastructure like South Pars (and subsequent retaliatory strikes on Gulf sites), ongoing proxy coordination, and the regime's possible continuity under its new leadership highlight the potential for such dynamics to emerge. The greatest danger, as Clausewitz warned, is misjudging success, pressing beyond its limits or declaring it too soon.
Clausewitz’s warning is clear: success can produce failure.
He would therefore ask: toward what end, at what cost, and how far?
He would also return to one of his most important insights: the relationship between the statesman and the general.
Policy gives war its purpose. The military provides the means. To subordinate political judgment to military logic is, in his words, absurd. But political leaders must understand war, and military leaders must understand the political purpose they serve. Strategy is the continuous alignment of political purpose and military action. When that relationship breaks down, strategy fails. This matters profoundly in this war.
If the political object remains limited, military operations must remain aligned to that purpose. If success tempts expansion, the nature of the war changes. The center of gravity may shift. The risks increase.
This is why Clausewitz remains the master of masters. He did not give us answers. He gave us a method.
If Clausewitz were watching the U.S.-Israel war in Iran, he would not be distracted by rhetoric or the latest theory being rushed to explain it. He would caution anyone attempting to simplify a war of such complexity. He would be especially skeptical of analysts forcing events into frameworks that require the facts to be bent to fit the theory.
The professor in him would point observers back to the method.
What is the political object?
What kind of war is being fought?
What is the enemy’s center of gravity?
What are the measurable effects of the means employed?
What are the indicators of success or failure?
How is the war being communicated between the generals executing it and the political leaders directing it?
And is the war moving toward its political purpose, or toward a point where success begins to undermine it?
Clausewitz would not tell us what to think.
He would teach us how to think.
That is why he remains the master of masters.
-------------------------------
John Spencer is the Executive Director of the Urban Warfare Institute.
He is the coauthor of Understanding Urban Warfare
Learn more at www.johnspenceronline.com
Substack: https://substack.com/@spencerguard
The views expressed in this article are the writer’s own.

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