Cognitive warfare is a real doctrinal concept: since 2020, NATO strategists have proposed recognising human cognition — attention, perception, judgement — as a battlefield in its own right, a possible sixth operational domain after land, sea, air, space, and cyber. It is not a mind-control fantasy, but a documented shift: the minds of populations are now named as a strategic objective. This guide sets out what is actually written, what remains uncertain, and how to defend oneself.
Definition. Cognitive warfare refers to the set of activities aimed at influencing, protecting, or disrupting the way individuals and groups perceive, reason, and decide. It differs from classical information warfare: it is no longer only about controlling messages or channels, but about targeting the mental processes by which a population processes information.
The founding text is public, and that is the essential point. In 2020, NATO's Allied Command Transformation (ACT), through its Innovation Hub based in Norfolk, Virginia, commissioned François du Cluzel, a former French officer in charge of the hub, to conduct a six-month exploratory study on "cognitive warfare." The resulting report, published in early 2021, is a document of some forty pages, accessible to the public. It is neither a leak nor a rumour: it is an avowed product of a NATO body.
This report defines cognitive warfare as an activity aimed at influencing, protecting, or disrupting cognition. It advances a formula that has become emblematic — "the brain will be the battlefield of the 21st century" — and evokes the prospect of a "militarisation of brain sciences." These sentences must be read for what they are: prospective assertions of an exploratory document, intended to alert and stimulate strategic reflection, and not the description of a capability that is already operational and demonstrated.
The same current proposes to recognise the cognitive domain as a sixth operational domain. This elaboration has not remained confidential: it has prompted public debate, including at the institutional level. A parliamentary question in the European Parliament in 2022, for instance, addressed the idea of the "weaponisation of brain sciences" evoked in NATO's work. That an elected assembly should question a doctrinal concept shows that the subject has moved beyond staff circles alone.
The interest of the concept does not lie in some secret weapon it would reveal, but in a shift of perspective: it officially declares that the attention, beliefs, and cohesion of a society constitute a strategic objective in themselves. And what is recognised as a battlefield logically calls for reflection on its defence.
Cognitive warfare was not born in 2020; placing it back in its history deflates its aura of absolute novelty. Psychological operations (PSYOP, often called MISO, Military Information Support Operations, in American vocabulary) are an old and formalised category of military action: disseminating selected information to foreign audiences to influence their emotions, reasoning, and behaviour. U.S. doctrine codifies it in black and white, for example in field manual FM 3-53 (2013). Leaflets dropped, radio broadcasts, loudspeakers on the front line: these techniques are documented throughout the 20th century, from the two world wars to the Cold War.
"Information warfare" refers more broadly to the set of actions aimed at gaining an advantage by controlling the information environment: protecting one's own flows, disrupting those of the adversary, shaping perceptions. This notion entered Western doctrine as early as the 1990s, in the wake of the digital revolution. Cognitive warfare differs from it in its object: no longer only the information that circulates, but the information-processing machine that is the human mind.
One can therefore read a continuity, not a magical rupture. The sequence can be summarised thus:
This genealogy has a protective virtue: it recalls that societies have survived decades of organised propaganda, and that none of these waves abolished free will, even if all weighed on opinions. Each innovation — radio, television, the internet — generated its own panic: it was feared that the masses would become docile automatons. Yet the social sciences have, each time, qualified these fears: audiences prove more active, more resistant, and more selective than the old "hypodermic needle" theories supposed. What truly changes with the digital age is not a supernatural power, but a transformation of scale and precision: targeting by profile, instant dissemination, real-time measurement, automation.
On social media, rigour is required more than anywhere else, for this is the terrain where exaggeration thrives. The existence of coordinated influence operations is solidly established there: the major platforms regularly publish reports on the takedown of "coordinated inauthentic" networks — fake accounts acting in concert to amplify messages — and institutions such as the European External Action Service (EEAS) now document, in annual reports on "Foreign Information Manipulation and Interference" (FIMI), these campaigns and their techniques (fake accounts, paid trolls, partial automation).
The RAND Corporation, a research centre working notably for American defence institutions, has produced several reference analyses. Its 2016 report, The Russian "Firehose of Falsehood" Propaganda Model (Christopher Paul and Miriam Matthews), describes a propaganda model characterised by high volume, multichannel dissemination, continuous speed and repetition, and above all an absence of commitment to truth or even consistency. The vivid name — "firehose of falsehood" — designates a saturation: flooding the public sphere with so many contradictory assertions that distinguishing the true becomes exhausting.
The RAND report anchors its explanation in psychology: repetition creates a feeling of familiarity that the mind confuses with veracity; the multiplicity of sources, even fake ones, gives the illusion of independent confirmation; and the first message received durably "anchors" perception. These mechanisms are documented in cognitive psychology; their deliberate exploitation on a large scale is what the model describes.
An honesty is required here, often glossed over: the existence of a campaign does not prove its effectiveness. Measuring the real effect of an influence operation on opinions, and still more on behaviours such as a vote, is extraordinarily difficult, and serious research remains cautious. To assert that a campaign "tipped" an election most often belongs to undemonstrated hypothesis. The honest reader distinguishes three questions: did the campaign exist (often: yes)? did it aim to influence (yes, by definition)? did it succeed, and to what extent (most often: indeterminate)?
No honest investigation can avoid the expression that comes up everywhere — and which must precisely be defused. The notion of hybrid warfare refers to the combination, within a single conflict, of conventional and unconventional means: cyberattacks, influence operations, economic pressures, irregular forces, disinformation. It is a useful and documented analytical concept, describing conflicts in which the boundary between war and peace becomes blurred.
The famous "Gerasimov doctrine," by contrast, is a contested attribution, widely recognised as erroneous. Its origin is clear. In 2013, the Russian general Valery Gerasimov published, in a professional defence journal, an article (in translation) "The Value of Science in Prediction." The British analyst Mark Galeotti commented on it on his blog and topped his post with the catchy title "the Gerasimov doctrine." The expression met with dazzling success in Western discourse.
Yet Galeotti himself publicly disavowed his formula. In an article with the explicit title, I'm Sorry for Creating the 'Gerasimov Doctrine' (Foreign Policy, 2018), he explains that the term was only a convenient title, that it designates no formal doctrine, and that Gerasimov's article largely described what the Russian author perceived as a Western strategy, not a Russian offensive plan. He developed the same analysis in a scholarly article with a telling title, "The mythical 'Gerasimov Doctrine' and the language of threat" (Critical Studies on Security, 2018), which calls the "Gerasimov doctrine" a myth and underlines the distortion of the original intent.
The persistence of this expression despite its disavowal by its own inventor is, in itself, a textbook case: a simple, striking, and anxiety-inducing formula spreads and takes hold faster than a nuanced correction. The myth of the "Gerasimov doctrine" has thus become a living demonstration of how an idea spreads, independently of its factual soundness. Rigour consists in distinguishing an observable phenomenon (the combination of varied means in certain conflicts) from an attested doctrine (an official text that would prescribe it): the first exists, the second under this name does not.
Disinformation differs from mere error (misinformation, false information spread without intent to harm) by its deliberate character: knowingly propagating false or misleading content to produce an effect. This distinction, now standard, matters: not all false information is a weapon, and confusing honest error with orchestrated manipulation muddies the analysis.
The "firehose of falsehood" model described by RAND rests on documented cognitive biases: the illusory truth effect (a repeated assertion seems truer), the weight of the first message received, and the fatigue induced by the contradictory flood. The aim of such saturation is not always to make a precise thesis believed: it may be, more perversely, to install generalised doubt — "one can no longer know who is telling the truth" — a state of mind that disengages the citizen and benefits whoever sows confusion. When truth seems inaccessible, inaction becomes the default response.
Hence a consequence often misunderstood: the most effective defence is not necessarily to refute each false assertion one by one — an endless task that may even reinforce the familiarity of the false through its repetition. It consists rather in strengthening discernment capacities upstream, and in disseminating reliable information first. This is precisely what the 2016 RAND report already recommended: to "inoculate" audiences rather than chase after the rebuttal.
A recognised battlefield calls for a defence — and this one is largely within the reach of the individual as of societies. Inoculation theory, formulated by the social psychologist William McGuire in the 1960s, rests on a medical analogy: just as exposure to a weakened form of a pathogen trains the immune system, exposure to a weakened form of a misleading argument, accompanied by its refutation, strengthens resistance to that type of manipulation. One does not vaccinate against a precise lie, but against a technique.
This theory has known a considerable empirical revival. The work of Sander van der Linden, Jon Roozenbeek, and their colleagues at Cambridge has tested prebunking (as opposed to late debunking) on a large scale. Experiments — including short videos disseminated on platforms, published notably in Science Advances in 2022 — have shown that exposing people, in advance, to disinformation techniques (manipulative language, incoherence, false dilemmas, scapegoating, ad hominem attacks) subsequently reduces their vulnerability to these devices. The effect has been observed in several contexts.
Media and information literacy complements this arrangement. Programmes developing source verification, the identification of a message's intentions, and the distinction between fact, opinion, and propaganda are recommended by many institutions, and several evaluations show their benefits. These approaches converge towards a single principle: effective cognitive defence is preventive and structural, not reactive and individual case by case. Concretely, it relies on a few markers:
The limits of these defences must be named honestly, lest one sell a false invulnerability. The effect of prebunking is not absolute: it declines with time and calls for "boosters," like a vaccination; it protects better against techniques explicitly presented than against novel devices; and it does not dispense with the effort of vigilance. Likewise, media literacy turns no one into an infallible judge. These tools reduce a vulnerability, they do not abolish it. Acknowledging this does not weaken them: it makes them honest, and therefore durable.
There is, finally, a defence that doctrinal reports rarely name: collective epistemic health. A society whose information institutions are reliable, whose citizens share common methods of verification, and whose public debate retains spaces of trust offers a far smaller attack surface to saturation and organised doubt. Conversely, a society already fractured, distrustful of every source, is ideal terrain for the "firehose of falsehood." The deepest defence is therefore not a technical gadget, but the patient cultivation of trust and shared rigour.
Does cognitive warfare really exist? Yes, as a documented doctrinal concept. Since 2020, NATO (via its Innovation Hub in Norfolk) has made it the subject of a public study, and several works propose to recognise cognition as a sixth operational domain. Recognising a battlefield is not, however, conceding unlimited power over minds: the doctrine exists, omnipotence does not.
Does cognitive warfare control our minds or our elections? No, this is precisely the fantasy to set aside. No documented source establishes a supernatural power over brains. The existence of an influence operation does not prove its effectiveness, and attributing the "tipping" of an election to a campaign most often belongs to undemonstrated hypothesis. Total "mind control" above all disarms by making people believe in their own powerlessness.
Is the "Gerasimov doctrine" real? No, it is a contested attribution widely recognised as erroneous. The expression was coined by the analyst Mark Galeotti from a 2013 article by General Gerasimov, then publicly disavowed by Galeotti himself in 2018, who recalls that it designates no formal doctrine. His own scholarly work calls it a myth.
How does one defend oneself concretely? Through documented and preventive gestures: go back to the sources, distinguish concept from capability and existence from effect, reject false doctrines, know the techniques of manipulation, and inoculate oneself through prebunking and media literacy. Knowledge itself is here the first line of defence: the mind that knows how it is being influenced ceases to be a passive target.
To go further, our mini-investigation Cognitive Warfare — Doctrine 2026 gathers these real sources (NATO, RAND, McGuire, van der Linden), dismantles the Gerasimov myth piece by piece, and offers six markers of cognitive defence applicable to daily life.
Yes, as a documented doctrinal concept. Since 2020, NATO (via its Innovation Hub in Norfolk) has made it the subject of a public study, and several works propose to recognise cognition as a sixth operational domain. Recognising a battlefield is not, however, conceding unlimited power over minds: the doctrine exists, omnipotence does not.
No, this is precisely the fantasy to set aside. No documented source establishes a supernatural power over brains. The existence of an influence operation does not prove its effectiveness, and attributing the "tipping" of an election to a campaign most often belongs to undemonstrated hypothesis. Total "mind control" above all disarms by making people believe in their own powerlessness.
No, it is a contested attribution widely recognised as erroneous. The expression was coined by the analyst Mark Galeotti from a 2013 article by General Gerasimov, then publicly disavowed by Galeotti himself in 2018, who recalls that it designates no formal doctrine. His own scholarly work calls it a myth.
Through documented and preventive gestures: go back to the sources, distinguish concept from capability and existence from effect, reject false doctrines, know the techniques of manipulation, and inoculate oneself through prebunking and media literacy. Knowledge itself is here the first line of defence: the mind that knows how it is being influenced ceases to be a passive target.
Yes, in the doctrinal sense: in October 2023, the French Army's CDEC published a research note "La guerre cognitive". The concept has a partly French paternity via the researcher Bernard Claverie, co-author of NATO's reference study. But doctrine and research do not prove an operational programme targeting citizens.
Dossier : Guerre cognitive & neuro-armes
MINI10: La Guerre Cognitive — Doctrine 2026
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