Royal Army College

Lesson Overview

Lesson 01 said a section moves to stay secure, together, and ready, in part by taking the tactical line rather than the easy one. This lesson is about how. The ground a section moves over is never neutral: every fold, hedge, wall, ditch, treeline, and slope either helps the section or helps whatever it must guard against. A soldier who can read it sees a route where an untrained eye sees only open country, and danger where another sees only a pleasant view.

This is the fieldcraft of the Navigation and Fieldcraft course, the prerequisite for this one, now applied to a moving section rather than a single soldier or a static position. There you learned to read contours, find cover, and conceal yourself; here you do all of that while several soldiers move together, watch in every direction, and stay in hand. A section commander must find ground that hides a whole body, keeps them in sight of one another so they can be signalled, and gives each somewhere to drop if things change. Reading the ground for a section is reading it for a body, not a point, and that is the harder skill this lesson builds.

Because the RKA is a humanitarian and home-defence force, this serves a search line on the high ground and a party moving to a relief site at least as much as any contact. Good use of ground lets a section search thoroughly, move unseen and unalarming through a community, and arrive ready. None of it is aggression: the tactics serve security and legitimacy, and are bounded throughout by the Law of Armed Conflict and the Rules for the Use of Force, as Lesson 01 set out.

By the end you will be able to distinguish cover from view from cover from fire and explain why mistaking one for the other is dangerous, recognise dead ground and the deception of crests and false crests, apply a simple set of the military aspects of ground to choose a tactical line, use ground sensibly at a halt, and account for how ground changes at night and in poor visibility.

Key Terms

Cover from view (concealment): anything that hides you from observation, such as a hedge, long grass, shadow, or a fold of ground; it stops you being seen, but does not stop a projectile.
Cover from fire (protection): anything solid enough to stop or reduce a projectile, such as an earth bank, a thick wall, or a rise of hard ground; it protects you, and usually conceals you as well.
Dead ground: ground that cannot be seen from a given vantage point because the shape of the land hides it; it can conceal you, and can equally hide a hazard or a person from you.
Crest: the highest line of a rise or slope, beyond which the ground falls away out of view; the line you must never be silhouetted on.
False crest: a nearer rise that looks like the true crest from below but is not; cresting it reveals more ground, and more of you, than expected.
Military aspects of ground: a short checklist a soldier runs on any terrain, covering observation, cover and concealment, obstacles, key ground, and the likely approaches.
Tactical line: the route chosen for the security it offers (folds, hedgerows, treelines, reverse slopes, shadow) rather than the route that is easiest or most obvious.
Reverse slope: the side of a rise that faces away from a threat or observer, hidden from view by the crest, and therefore a natural covered line of movement.
Defilade: the protection the shape of the ground itself gives, where a fold, bank, or slope screens a soldier from view or from fire without any built cover at all.

Cover from view and cover from fire

This is the first distinction a soldier must hold firmly, because confusing the two can be fatal. Cover from view hides you. Cover from fire protects you. Many things that hide you superbly will stop nothing at all.

A hedge is the classic trap. Behind a thick summer hedge you feel hidden, and you are; nobody can see you. But a hedge is leaves and thin branches, and a projectile passes through it as if it were not there. It gives cover from view only, as do long grass, reeds, saplings, camouflage netting, smoke, darkness, and shadow: all conceal, none protect. The trap is that concealment invites you to relax precisely because you cannot be seen.

Cover from fire is rarer. It is mass: a solid earth bank, a thick stone or brick wall, a substantial tree trunk, a rise of firm ground, a vehicle's engine block. These stop or slow a projectile, and they almost always conceal you too. The skill is to know which is which on sight, and to position against the side that faces the threat, low, showing only enough of yourself to observe. There is a rough order of merit. Earth in quantity is the most reliable, a bank a foot or two deep absorbing what enters it with more to drop behind. A wall is good in proportion to its thickness, a thick old stone wall far better than a single skin of breeze block. Thin sheet, a corrugated fence, a car door, a wooden gate stops almost nothing and belongs with concealment. The honest question is not "is something there" but "is there enough of the right material, in the right place, to stop a round before it reaches me".

Cover also protects only against fire from the direction it faces. A bank that screens you perfectly from a threat on the level can leave you exposed to anything on higher ground, because fire from above arrives over the top and down onto you. This is why a re-entrant or a sunken lane, which feels enclosed and safe, can be the most exposed place of all when there is high ground to either side, as the Navigation and Fieldcraft contour work warned of the floor of a steep-sided valley. Choose cover against the direction the danger lies, and look up as well as along.

The rule for a moving section is simple to state and hard to keep under fatigue: use concealment to avoid being seen, but never trust it to stop a projectile. In practice, plan a route so the concealment you move behind, which is plentiful, always has real cover, which is rare, within a stride or two, so the section can convert from hidden to protected without crossing open ground. Ask of every hedge and bank and wall: will this only hide me, or will it actually stop a round?

Dead ground, crests, and false crests

Dead ground is any ground hidden from a particular viewpoint because the shape of the land gets in the way: the far side of a rise, the bottom of a dip, the lee of a bank, the floor of a re-entrant. It is double-edged. Because it is always relative to a viewpoint, the first question is "dead to whom": the dip that screens you from the ridge does nothing about the spur on the other flank. Reading it well means picturing the ground from the watcher's place, not your own.

Used well, dead ground is a gift. A route that links patches of it lets a section move with the land screening it from where a threat might watch, or simply from a road or a window. The lee of a long bank, the dip behind a hedge line, the reverse slope of a ridge: these are the corridors a tactical line is built from. This screening, given without any built cover, is defilade, and the contour work in Navigation and Fieldcraft lets you find it on the map beforehand: wherever a line of sight from a vantage point must pass through higher ground to reach a stretch beyond, that stretch is dead to it.

But the same dead ground that hides you hides things from you, a hazard, a person you are searching for, or a danger better met ready than by surprise. So it is approached, never blundered into: the section slows, observes the edge, and clears it deliberately, because cresting a rise or rounding a bank is the moment the unseen becomes seen, in both directions at once. On a humanitarian task the missing walker or the casualty lies precisely in this hidden ground, so the drill is the same whether what waits is a danger or a person to help: come up to the edge slowly and low, look before committing the section, and bring it forward only once the ground beyond has been read.

That moment is governed by the crest, the high line beyond which the ground drops away. Its danger is the skyline: a soldier on the crest is outlined against the open sky, the single most visible thing in any landscape, as your fieldcraft training warned. So a section does not walk over on the high line. The deliberate crossing is a small drill. The section halts short of the high line, in cover. One soldier, or a small part of the section, moves up slowly and low to where a bush, rock, or fold breaks the outline, so that even a head there is not a clean silhouette, and observes the ground beyond. Only when it has been read does the rest cross, at the lowest point, quickly, and not all at the same spot, so the section is never strung along the skyline in a row.

The false crest is the subtler trap. From below, a nearer rise often looks like the top, but beyond it the ground rises again to a true crest further back. A section that treats the false crest as the top, relaxes, and walks on finds itself suddenly exposed on the real skyline. Expect false crests and confirm what lies beyond before assuming you have reached the top; the map warns of them, contours that ease and then steepen again, or a small ring of contour with higher ground behind it. The plain rule: treat every rise as though the real exposure lay just beyond it.

   Observer's line of sight
   o- - - - - - - - - - - - - X (cannot see past the crest)
    \                         :
     \                      "crest"
      \                  .--/\
       \             .--/    \   <- reverse slope:
        \        .--/         \     hidden ground,
   . . . X____.-/              \    a covered route
   visible    ^                 \   OR a hidden hazard
   ground   "false               \________
            crest"        "dead ground" behind the crest

A simple set of the military aspects of ground

A soldier needs a habit, not a long list, for sizing up ground quickly. The Commonwealth tradition gives a short checklist of the military aspects of ground, which we keep plain for a small force. Run it on any terrain you must cross or hold; the point is not to fill in a form but to stop the eye fixing on one striking feature and missing the rest.

Observation and fields of view. What can be seen from here, and what can see me? The trained habit is to do it from the other side: stand, in the mind, at each likely vantage point and ask what it can see; the ground a watcher there cannot see into is the ground your route should use.
Cover and concealment. Where is real cover from fire, and where is mere cover from view? Read a whole stretch as a chain: a good tactical line keeps concealment more or less continuous and real cover frequent enough that the section is never more than a stride or two from something solid to drop behind.
Obstacles. What would slow or channel movement: a river, a wall, a fence line, a steep bank, a marsh, a built-up edge? Obstacles funnel us into the open or the obvious, where trouble waits. The gate, the ford, the bridge, and the gap in the hedge funnel everyone alike, and are where, on a search, the people the ground has likewise funnelled are most likely to be found.
Key ground (and vital ground). Which piece of ground, if held, gives an advantage: a knoll that overlooks the valley, a bridge that controls a crossing? It matters even on a humanitarian task, because the high point that lets you observe a search area, or the one patch of dry ground above a flood, is key ground for that task. Vital ground is stricter, ground the whole task turns on; naming it focuses the section on what matters rather than treating every field alike.
Likely approaches. By what routes would someone sensibly move through this ground, and which would we choose? People, like water, follow the easy gradient, the valley floor, the track, the gap in the obstacle. Reading where the ground makes movement easy tells you where others will appear, which predictable line to avoid for your own route, and, on a search, where a lost or injured person most likely went.

Hold these as one quick sweep of judgement. With practice a soldier reads a stretch of country in seconds: there the high ground that overlooks us, there the covered line along the treeline, there the gateway that funnels us into the open, there the knoll worth holding. Drill it by running the five aspects aloud at every halt of an exercise until the list stops being a list and becomes the way the eye works.

Choosing the tactical line

From that reading comes the choice of route, the tactical line. It and the easy line are rarely the same, and a section that takes the easy one has usually taken the wrong one. The easy line follows the path, the open field, the gentle gradient, the obvious way; it is the line a group of walkers takes, and it puts the section in plain view on the most predictable route in the area.

The tactical line uses the ground for cover and concealment. It hugs the inside of a hedgerow rather than crossing the open field; it follows the lee of a bank or the line of a ditch; it stays just below a ridge on the reverse slope rather than walking the skyline; it moves through the shadow of a treeline or a building rather than the sunlit open beside it; it links dead ground to dead ground. It costs more in effort and often in distance, and it is worth the cost, because it buys what Lesson 01 called the price of not being surprised.

A commander works it on the map roughly like this. First, mark the vantage points, the high ground, windows, and lone buildings from which a watcher could overlook the line of march, and treat their fields of view as ground to stay out of. Second, find the screens, the hedgerows, treelines, banks, ditches, walls, and folds of dead ground out of those watchers' view. Third, find the cover, the points along those screens with something solid to drop behind. Fourth, join them up from one patch of dead ground to the next, concealed for as much of the way as possible and within a stride of cover, crossing unavoidable open stretches at their narrowest, quickly, with someone watching. Fifth, mark the danger points that remain, the crest, the gate, the open field, so the section meets them as planned events and not surprises. The route that comes out is rarely the shortest and never the easiest.

Some plain habits build a good tactical line:

Avoid skylines and crests; cross them low, fast, and rarely.
Keep something between you and the likely vantage points: a fold, a hedge, a wall, a treeline, the shape of the slope.
Use shadow and the darker, broken edges rather than open, sunlit, uniform ground.
Skirt the obvious gate, gap, and track, the choke points everyone is funnelled through, or cross them quickly with others watching.
Prefer the route that lets you pause and observe over the one that commits you to the open, and keep real cover within reach, not just concealment.

None of this abandons the section's other needs. The tactical line is still chosen so the section can stay together, see and signal, and be commanded; a route so clever that it strings the section out has failed the test of control over speed. The most perfectly concealed line may run through ground so broken that the section cannot keep sight of one another, and then a slightly more open line that keeps it in hand is the better one. The formations and spacing that make this work are Lesson 03: use of ground chooses where the section moves, formations decide how it is arranged.

Using ground at the halt, and ground at night

A halt is not a pause from using the ground; it is one of the moments it matters most, as the lesson on the halt and the observation post will develop. When a section halts it goes to ground, into the nearest cover and concealment, low and off the skyline, rather than standing in the open. Each soldier takes a position that lets them watch their arc while staying hidden, and the section settles where the ground gives both concealment and, ideally, something solid to drop behind. The same eye that chose the route chooses the halt: not the comfortable spot, but the one that sees out without being seen and offers a way to react. The reading is the same five aspects, asked now of a place to stop. How the section then arranges itself, the snap halt, all-round defence, and the arcs, is the work of Lesson 05.

Ground changes after dark and in fog, rain, or mist, and the change cuts both ways. Cover from view comes more easily, because poor visibility conceals a great deal on its own; but the features you navigate and shelter by are harder to find, and dead ground becomes a place you can stumble into rather than observe. By day the section reads ground mostly by sight and at a distance; by night sight shrinks to a few paces, so it reads close in and by feel, the rising slope underfoot, the wall or hedge followed by hand as a handrail, the change from grass to track sensed through the boots. The folds and screens that hid the section by day still hide it, but are met one at a time rather than chosen ahead. And the skyline darkness seems to have abolished is often still there: a ridge crossed against a faintly lit sky, the glow of a town, or the last of the dusk outlines a careless soldier as cleanly as daylight, so the discipline of crossing crests low holds after dark exactly as by day.

As your fieldcraft and navigation training stressed, more is heard than seen at night, so the ground's value shifts from what hides the eye to what muffles or carries sound: hard ground, walls, and water carry it, soft ground and broken cover muffle it. The section moves more slowly, keeps closer together so it does not lose contact in the dark, and never assumes darkness alone has made it safe. The drills are the same; the margins are tighter. This is the Navigation and Fieldcraft skill set applied by feel and by ear when the eye can no longer do the work alone.

In Practice: A Presence Patrol Through the Valley After the Storm

A Kaharagian section moves through a farming valley the morning after a heavy storm, on a presence patrol to reassure the community and report damage for the relief effort. There is no threat; the task is humanitarian, and the section's manner is open and courteous. Yet it still reads and uses the ground throughout. Before stepping off, the commander reads the valley on the map and through the eye: a lone farmhouse on the rise overlooks the open road, so the road is ground to stay off; a long bank and a field-edge hedge run down the valley out of that farmhouse's view, so they are the screen; a low stone wall along the bank gives somewhere solid every so often. The line is drawn along the hedge and the bank, from one patch of dead ground to the next, with the open stretch by the ford marked as a point to cross quickly. So the section does not stroll down the open road; it takes the tactical line along the field edges and the lee of the bank, moving without alarming anyone and seeing the whole valley as it goes.

Approaching a rise in the track, the lead soldier treats it as a crest and possible false crest, halting the section short of the high line, moving up slowly and low to where a bush breaks the outline, and observing the dead ground beyond before committing; there the soldier finds a fallen tree blocking the lane just over the top, now reported as damage rather than walked into. At the ford, some watch from the cover of the bank while others cross quickly and low, and the section re-forms in the dead ground beyond. At a halt to send a damage report, it goes to ground in a hedge line and the low stone wall, off the skyline, each watching an arc; the commander notes that the hedge hides them but the wall is the thing to drop behind, and that the farmhouse overlooks the field, so that arc is watched first. Nothing here is combat, yet every habit of reading and using the ground is at work, and it is exactly what makes the patrol thorough, unalarming, and safe.

Check Your Understanding

Explain the difference between cover from view and cover from fire, with one example of each, and why a soldier who crouches behind a thick hedge believing it will protect them is in danger. Why can a bank that protects you on the level still leave you exposed to fire from higher ground?
What is dead ground, and why is it double-edged? Explain why it is always "dead to someone", and describe the deliberate drill a section uses to cross a crest safely.
List the military aspects of ground, and explain how reading them leads to choosing a tactical line rather than the easy one. Outline the method a commander uses to draw the line, and give two habits that mark a good one.

Reflection (write a short paragraph): The tactical line almost always costs more, in effort, in distance, in patience, than the easy line that runs straight down the open path. On a quiet humanitarian task, when there is plainly no threat in the valley, the easy line is tempting and would do no obvious harm. Think about what it means to keep choosing the harder, disciplined line when nothing seems to require it, and why the section that habitually reads and uses the ground, even on the hundredth peaceful patrol, is the one ready for the single day the ground turns against it. What does that steady, unrewarded discipline ask of you personally as one soldier whose laziness or care affects the whole section?

Summary

Cover from view hides you; cover from fire protects you. Concealment (hedges, grass, shadow, smoke) stops no projectile, so never trust it to protect you. Cover from fire is mass, and it protects only against the direction it faces. Move behind concealment while staying within a stride of real cover.
Dead ground is hidden by the shape of the land, always dead to a particular viewpoint; it screens a moving section but equally hides hazards and the people a search is sent to find, so it is cleared deliberately, never blundered into. Crests and false crests expose a section on the skyline and are crossed low, fast, at the lowest point, and only after a soldier has gone up first to read the ground beyond.
The military aspects of ground are read as one quick sweep: observation and fields of view, cover and concealment, obstacles, key and vital ground, and the likely approaches.
The tactical line uses folds, hedgerows, treelines, reverse slopes, dead ground, and shadow rather than the easy route; it is built by mapping the vantage points, the screens, and the cover, then joining them up, and is still chosen so the section stays in hand. The formations that hold it together are Lesson 03.
A halt is an active use of ground, developed fully in Lesson 05. Ground reads differently at night: concealment comes more readily but is read close in, by feel and by ear, the skyline can still betray against a lit sky, and the quieter line matters as much as the more hidden one. This is the Navigation and Fieldcraft skill set applied to a moving section, serving search and relief tasks as much as any contact.

Reading and Using the Ground