This publication, titled “Camouflage, Concealment, and Decoys (FM 20-3)”, is a U.S. Army field manual that provides a comprehensive framework for reducing visibility and avoiding detection in hostile environments. It teaches that survival on the battlefield is not just about firepower or movement, but about the ability to remain unseen, unidentified, and unpredictable. The manual emphasizes that camouflage and concealment are essential skills at both the individual and unit level, directly impacting survivability and mission success.
A central concept of the document is understanding how enemies detect targets. It explains that detection goes far beyond simple visual observation and includes advanced sensor systems such as infrared, radar, night vision, and acoustic detection. The guide breaks down how these systems work and highlights the importance of minimizing “signatures” such as heat, movement, noise, shape, and patterns. By understanding how detection happens, individuals can apply countermeasures to reduce their chances of being seen or targeted.
The manual also introduces core camouflage principles, including hiding, blending, disguising, disrupting, and using decoys. These techniques are applied using both natural terrain and man-made materials to break up recognizable features and blend into the environment. It stresses that effective concealment is not just about covering something, but about thinking from the enemy’s perspective—what stands out, what looks unnatural, and what draws attention. Small details like tracks, shadows, and repeated patterns can give away positions if not managed properly.
Another major focus is discipline and behavior, not just equipment. The guide explains that movement, light, heat, and even trash can reveal a position. Maintaining strict discipline—such as minimizing noise, controlling light at night, and avoiding predictable routines—is just as important as physical camouflage. It also highlights the use of decoys and deception, which can mislead an enemy into wasting resources or targeting false positions, increasing overall survivability.
Overall, this manual is a complete system for avoiding detection, combining environmental awareness, technical knowledge, and disciplined behavior. While written for military use, its principles translate directly into survival, hunting, and preparedness scenarios—making it highly valuable for anyone looking to improve stealth, situational awareness, and operational security in real-world conditions.
FM 20-3
CAMOUFLAGE, CONCEALMENT, ANDDECOYS
Headquarters Department of the Army
Washington, DC, 30 August 1999
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