Silent Approach and Concealment Techniques in the Ukraine War

The battlefields of Ukraine in 2022–2025 became one of the most surveilled combat environments in history. Persistent drone coverage, thermal imaging proliferation, acoustic sensors, and satellite reconnaissance combined to create a near-transparent battlefield in which traditional mass movement was nearly suicidal. In response, both Ukrainian and Russian forces developed and refined a sophisticated repertoire of covert approach and concealment techniques — many drawn from long-standing doctrine, others improvised in direct response to the specific threat of ubiquitous FPV and observation drones. The result was a tactical environment where concealment skill determined survival as much as firepower.

The Drone Surveillance Threat and Its Implications

By 2023, virtually every section of the front line was under intermittent if not continuous observation by small unmanned aerial vehicles. Ukrainian forces employed Mavic 3 series commercial drones and Leleka reconnaissance UAVs in large numbers, while Russian forces matched scale with Orlan-10 systems and commercial equivalents. FPV kamikaze drones capable of pursuing individual soldiers and striking vehicles created a specific tactical problem: any visible movement in open terrain within drone-operating altitude attracted attack within minutes.

The response was a fundamental change in how infantry moved. Rather than the traditional "bounds" of one element covering another in the open, Ukrainian and Russian assault infantry shifted to movement through concealment — tree lines, drainage ditches, damaged buildings — and to night movement exploiting the reduced drone effectiveness at night, particularly when combined with digital radio silence. This made the covert approach not a special forces technique but a standard infantry skill.

Camouflage Nets Against Thermal Detection

Standard camouflage netting, effective against visual observation for decades, required adaptation to counter thermal imagers. Visual-spectrum camouflage netting does not impede infrared wavelengths; a vehicle covered in standard netting remains fully visible to a thermal camera. This drove rapid adoption of multispectral camouflage netting incorporating metallic-coated materials or aerogel insulation layers that reduce the thermal gradient between a vehicle and its background signature.

Swedish Barracuda and Polish alternatives became high-priority items in Ukrainian procurement after the significance of thermal visibility became clear in late 2022. Vehicle crews learned to park under natural canopy where possible, allowing the thermal mass of the earth and vegetation to mask residual engine heat. Portable thermal screens — essentially IR-opaque tarps — became standard vehicle equipment for static positions, draped over engine decks after movement to reduce cooldown signatures detectable by overhead drones.

FPV Drone Countermeasures by Infantry

The FPV attack drone emerged as the defining tactical weapon of 2023–2025. Capable of following an individual soldier at speeds of 60–100 km/h and striking with a grenade-sized warhead, FPVs forced infantry to develop specific countermeasures. Electronic jamming devices — handheld "drone guns" and backpack EW systems — became standard equipment for assaulting infantry teams, though their effectiveness varied by drone type and electronic countermeasures capability.

Physical countermeasures proved equally important. Steel mesh "cope cages" mounted on vehicle tops defeated many early FPV designs by causing premature detonation. Infantry in trenches covered positions with netting or corrugated metal. Soldiers learned to move in short sprints between terrain features rather than in sustained movement that an FPV operator could intercept. The "dead time" technique — freezing in place when a drone is heard — exploited the difficulty of visually acquiring a stationary target among rubble or vegetation from the drone's field of view.

Use of Tree Lines and Terrain Masking

Ukraine's agricultural landscape — flat open fields alternating with shelterbelts, windbreak tree lines, and river-valley woodlands — created specific constraints and opportunities for concealed movement. Tree lines running perpendicular to the front provided corridors of concealment for vehicle movement that radar and optical surveillance could not penetrate. Ukrainian logistics operators learned to time vehicle movement through open gaps in these lines during periods of known drone inactivity or poor weather.

Terrain masking — placing the mass of earth, embankments, or buildings between the moving element and the likely threat axis — became mandatory skill. The reverse slope technique, positioning on the far side of ridges and berms relative to enemy thermal observation, was applied not only to vehicles but to personnel fighting positions. Units proficient in terrain reading consistently suffered lower attrition from observation-directed fires than those that moved in the open regardless of thermal camouflage.

Sound Discipline and Low-Emission Techniques

Acoustic detection represented a complementary surveillance layer. Russian forces deployed ground-mounted acoustic sensors along approaches to their defensive lines, capable of detecting vehicle engine signatures at ranges of several km. Ukrainian sappers and light infantry learned to approach these defensive belts on foot rather than by vehicle, accepting the physical burden of carrying anti-tank weapons to within engagement range.

Sound discipline extended to radio silence protocols. The "black-out move" — dismounted infantry movement with all radios off and mobile phones left at the staging position — became standard for platoon-size infiltration operations. Navigation was conducted with GPS devices running in silent mode, and leaders memorized route plans rather than consulting maps or devices during movement. This approach denied enemy radio-direction-finding systems the ability to track the assault element's approach.

Low-Emission Thermal Suits

Personal thermal suppression suits, drawing on hunting and sniper technology, were adopted by reconnaissance and assault infantry. The most effective designs used aerogel insulation combined with outer layers matching the ambient ground temperature, reducing human thermal signature to background levels. Such suits demanded significant wearer sacrifice — physical activity generated heat that accumulated inside, limiting wear time to 30–60 minutes before body core temperature increased dangerously. Their use was therefore concentrated in static observation and the final approach phase of reconnaissance missions.

Lessons from Both Sides

Both Ukrainian and Russian forces drew adapting lessons from the surveillance-dense battlefield. Russian forces, initially far less adept at drone-aware movement, suffered catastrophically in 2022 from infantry columns moving in the open along predictable road axes. By 2024 Russian assault infantry had internalized many of the same concealment techniques as their Ukrainian counterparts — moving at night, using terrain, dismounting vehicles well before objective areas, and employing group-level electronic jamming.

Ukrainian forces maintained a doctrinal advantage by institutionalizing these lessons faster through their combat experience network and Western training support. The collective learning that "every meter of open ground is potentially observed" permanently altered how units planned routes, timed movements, and structured assault formations. The concept of the approach march — that period between staging area and assault position — was reborn as a specialized skill demanding meticulous planning equal to the assault itself.

FAQ

Can standard camouflage clothing hide a soldier from thermal cameras?

No. Standard camouflage patterns are designed for visual concealment and offer no protection against thermal imaging, which detects body heat. Effective thermal concealment requires specialized materials — aerogel or insulated suits — that reduce heat emission or blend body temperature with surroundings. Even these measures are imperfect when the soldier is physically active and generating significant metabolic heat.

What makes FPV drones particularly difficult to counter during an assault?

FPV drones are small, fast, and can be piloted from km away by someone watching a live video feed. They can pursue moving targets, navigate around obstacles, and strike vulnerable points on vehicles or personnel. Their low cost — often under $500 — means they are available in large numbers. Electronic jamming can disable many, but frequency-hopping and fiber-optic guided variants are resistant to RF jamming.

Why is sound discipline important if drones use visual detection?

Sound discipline is important for a different threat: acoustic sensors and audio-direction-finding systems can detect vehicle engine noise and radio transmissions at significant range. Drones can be cued to a location by acoustic detection before they acquire a visual fix. Additionally, radio transmissions allow enemy electronic warfare systems to locate a unit's position through direction finding.

Were thermal suits widely issued or only used by special forces?

In the early period of the war, thermal suppression suits were rare and concentrated in special reconnaissance units. As the war progressed and commercial versions became available through crowdfunding and procurement networks, they spread to frontline infantry and sniper teams. However, full thermal suits remained less common than partial measures like vehicle covers and camouflage netting due to cost and wearer discomfort.

How does terrain masking differ from conventional cover and concealment?

Traditional cover and concealment addresses protection from direct fire and visual observation. Terrain masking specifically addresses overhead and oblique observation — using the earth's surface geometry to place intervening mass between an observer's line of sight (from a drone above or across terrain) and the concealed element. In a drone-dominated environment, vertical concealment from above becomes as important as horizontal concealment from the front.

Sources

1. Jack Watling and Nick Reynolds, RUSI, The Plot to Destroy Ukraine's Air Defenses and associated tactical analyses, 2022–2024.
2. U.S. Army Combined Arms Center, Multi-Domain Operations Lessons from Ukraine, Fort Leavenworth, 2023.
3. Mick Ryan, War Transformed: The Future of Twenty-First-Century Great Power Competition and Conflict, Naval Institute Press, 2022.
4. Anders Puck Nielsen, Danish Defence College analysis of drone countermeasures in Ukrainian tactical doctrine, 2023.
5. Mil.in.ua and Ukrainian operational telegram channels documenting infantry tactics and equipment innovations, 2023–2025.