One of the simplest yet most effective WWI deception examples described by Rankin (2009) is the British use of realistic camouflage disguised as natural terrain, most notably fake trees, to conceal artillery observation posts. Artist Solomon J. Solomon designed hollow steel observation towers that replaced real trees near the front line at night, allowing hidden observers to direct artillery fire. This represents a denial-based military deception information operation, relying on camouflage and concealment rather than messaging to mislead adversary decision makers. By embedding observers in visually familiar terrain, British forces denied German intelligence accurate indicators of observation activity. The deception worked because of inattentional blindness and normalcy bias. As Bernays (1928) argues, individuals rely on mental shortcuts to manage complexity, and familiar objects are cognitively filtered out rather than scrutinized. Because the environment appeared unchanged, German forces had no reason to reassess their assumptions.
A second example appears in Rankin’s section “Engineering Opinion,” illustrating gray propaganda as an information operation. Through the War Propaganda Bureau at Wellington House, the British government conducted a discreet, unattributed campaign aimed at educated elites in neutral and Allied countries. The Bureau amplified real events such as German actions in Belgium, the execution of Edith Cavell, and the sinking of the Lusitania while framing them as symbolic proof of inherent enemy barbarism, at times adding sensational or unverified details and suppressing inconvenient facts. This deception exploited authority bias and the affect heuristic, as discussed by Bernays (1928) and Cialdini (2009). By using respected writers, historians, and public intellectuals as messengers, the campaign laundered credibility, making propaganda appear independent and trustworthy. Emotional framing and elite endorsement guided opinion without overt coercion, allowing selective exaggeration and omission to become normalized in public memory.
A third example involves tactical deception through concealment, decoys, and misdirection in the sniping and counter-sniping warfare around the Ypres Salient. This case represents a tactical, denial-based, and interactive MILDEC designed to provoke specific adversary actions, namely, firing at decoys that could then be exploited for targeting. British forces used irregular trench layouts, camouflaged sniper hides, ghillie suits, and decoys such as dummy heads and staged movements to draw enemy fire and expose sniper positions. This deception worked by exploiting inattentional blindness, pattern-recognition bias, and affect-driven reactions under stress. Enemy soldiers relied on expectations of symmetry and familiar human shapes, which British forces deliberately disrupted through concealment and visual clutter. Fear and sudden shock encouraged impulsive responses, making enemy behavior more predictable. Rather than merely obscuring reality, the deception shaped adversary behavior. Decoys and feigned exposure functioned as behavioral triggers, priming enemy snipers to act on perceived threats. As discussed in Week 1 materials on priming, repeated exposure to salient cues narrows attention and accelerates reactive decision-making, allowing British forces to convert enemy firing responses into actionable intelligence.
References:
Rankin, Nicholas. A Genius for Deception : How Cunning Helped the British Win Two World Wars, Oxford University Press, Incorporated, 2009.
Bernays, Edward L. 1928. Propaganda. New York: Horace Liveright.
Cialdini, Robert B. 2009. Influence: The Psychology of Persuasion. New York: HarperCollins Publishers.