An ambush is a long-established military tactic
Military tactics
Military tactics, the science and art of organizing an army or an air force, are the techniques for using weapons or military units in combination for engaging and defeating an enemy in battle. Changes in philosophy and technology over time have been reflected in changes to military tactics. In...

, in which the aggressors (the ambushing force) take advantage of concealment and the element of surprise to attack an unsuspecting enemy from concealed positions, such as among dense underbrush or behind hill
A hill is a landform that extends above the surrounding terrain. Hills often have a distinct summit, although in areas with scarp/dip topography a hill may refer to a particular section of flat terrain without a massive summit A hill is a landform that extends above the surrounding terrain. Hills...

tops. Ambushes have been used consistently throughout history, from ancient
Ancient warfare
Ancient warfare is war as conducted from the beginnings of recorded history to the end of the ancient period. In Europe and the Near East, the end of antiquity is often equated with the fall of Rome in 476, and the wars of the Eastern Roman Empire Byzantium in its South Western Asian and North...

 to modern warfare
Modern warfare
Modern warfare, although present in every historical period of military history, is generally used to refer to the concepts, methods and technologies that have come into use during and after the Second World War and the Korean War...


In zoology
Zoology |zoölogy]]), is the branch of biology that relates to the animal kingdom, including the structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct...

, an ambush predator
Ambush predator
Ambush predators or sit-and-wait predators are carnivorous animals that capture prey by stealth or cunning, not by speed or necessarily by strength. These organisms usually hide motionless and wait for prey to come within striking distance. They are often camouflaged, and may be solitary...

 is an organism which uses ambush tactics to capture prey.


In ancient times, an ambush often might involve thousands of soldiers on a large scale, such as over a mountain pass
Mountain pass
A mountain pass is a route through a mountain range or over a ridge. If following the lowest possible route, a pass is locally the highest point on that route...

. Ambushes appear many times in military history. One outstanding example from ancient times is the Battle of the Trebia
Battle of the Trebia
The Battle of the Trebia was the first major battle of the Second Punic War, fought between the Carthaginian forces of Hannibal and the Roman Republic in December of 218 BC, on or around the winter solstice...

 river. Hannibal encamped within striking distance of the Romans with the Trebia River between them, and placed a strong force of cavalry and infantry in concealment, near the battle zone. He had noticed, says Polybius, a “place between the two camps, flat indeed and treeless, but well adapted for an ambuscade, as it was traversed by a water-course with steep banks, densely overgrown with brambles and other thorny plants, and here he proposed to lay a stratagem to surprise the enemy”. When the Roman infantry became entangled in combat with his army, the hidden ambush force attacked the legionnaires in the rear. The result was slaughter and defeat for the Romans. Nevertheless the battle also displays the effects of good tactical discipline on the part of the ambushed force. Although most of the legions were lost, about 10,000 Romans cut their way through to safety, maintaining unit cohesion
Unit cohesion
Unit cohesion is a military concept, defined by one former United States Chief of staff in the early 1980s as "the bonding together of soldiers in such a way as to sustain their will and commitment to each other, the unit, and mission accomplishment, despite combat or mission stress"...

. This ability to maintain discipline and break out or maneuver away from a killing zone is a hallmark of good troops and training in any ambush situation. See Ranger reference below.

Another famous ambush was that sprung by Germanic warchief Arminius
Arminius , also known as Armin or Hermann was a chieftain of the Germanic Cherusci who defeated a Roman army in the Battle of the Teutoburg Forest...

 against the Romans at Battle of the Teutoburg Forest
Battle of the Teutoburg Forest
The Battle of the Teutoburg Forest took place in 9 CE, when an alliance of Germanic tribes led by Arminius of the Cherusci ambushed and decisively destroyed three Roman legions, along with their auxiliaries, led by Publius Quinctilius Varus.Despite numerous successful campaigns and raids by the...

. This particular ambush was to have an impact on the course of Western history. The Germanic forces demonstrated several principles needed for a successful ambush. They took cover in difficult forested terrain, allowing the warriors time and space to mass without detection. They had the element of surprise, and this was also aided by the defection of Arminius from Roman ranks prior to the battle. They sprung the attack when the Romans were most vulnerable- when they had left their fortified camp, and were on the march in a pounding rainstorm. They did not dawdle at the hour of decision but attacked quickly, using a massive series of short, rapid, vicious charges against the length of the whole Roman line, with charging units sometimes withdrawing to the forest to regroup while others took their place. The Germans also made use of blocking obstacles, erecting a trench and earthen wall to hinder Roman movement along the route of the killing zone. The result was mass slaughter of the Romans, and the destruction of 3 legions. The Germanic victory caused a limit on Roman expansion in the West. Ultimately, it established the Rhine as the boundary of the Roman Empire for the next four hundred years, until the decline of the Roman influence in the West. The Roman Empire made no further concerted attempts to conquer Germania beyond the Rhine.

The importance of such principles as the use of rugged terrain allowing cover and concealment, the element of surprise, and the quick assault/advance comes down to the present day, and is stressed in US Army Ranger doctrine concerning ambushes.


In modern warfare, an ambush is most often employed by ground troops up to platoon
A platoon is a military unit typically composed of two to four sections or squads and containing 16 to 50 soldiers. Platoons are organized into a company, which typically consists of three, four or five platoons. A platoon is typically the smallest military unit led by a commissioned officer—the...

 size against enemy targets, which may be other ground troops, or possibly vehicles. However, in some situations, especially when deep behind enemy lines, the actual attack will be carried out by a platoon, a company
Company (military unit)
A company is a military unit, typically consisting of 80–225 soldiers and usually commanded by a Captain, Major or Commandant. Most companies are formed of three to five platoons although the exact number may vary by country, unit type, and structure...

-sized unit will be deployed to support the attack group, setting up and maintaining a forward patrol harbour from which the attacking force will deploy, and to which they will retire after the attack.


Ambushes are complex, multi-phase operations, and are, therefore, usually planned in some detail. First, a suitable “killing zone” is identified. This is the place where the ambush will be laid. It's generally a place where enemy units are expected to pass, and which gives reasonable cover for the deployment, execution, and extraction phases of the ambush patrol. A path along a wooded valley floor would be a typical example.

Ambush can be described geometrically as:
  • Linear, when a number of firing units are equally distant from the linear kill zone.
  • L-shaped, when a short leg of firing units are placed to enfilade (fire the length of) the sides of the linear kill zone.
  • V-shaped, when the firing units are distant from the kill zone at the end where the enemy enters, so the firing units lay down bands of intersecting and interlocking fire. This ambush is normally triggered only when the enemy is well into the kill zone. The intersecting bands of fire prevent any attempt of moving out of the kill zone.


To be successful, an ambush patrol must deploy into the area covertly, ideally under the cover of darkness. The patrol will establish secure and covert positions overlooking the killing zone. Usually, two or more “cut-off” groups will be sent out a short distance from the main ambushing group, into similarly covert positions. Their job is twofold; first, to give the ambush commander early warning of the approaching enemy, and second, when the ambush is initiated, to prevent any enemies from escaping. Another group will cover the front and rear of the ambush position (blocking force), and thus provide all round defence
All round defence
All round defence is a defensive posture, usually adopted in times of confusion by all military units from squad up. In a prepared position, all round defence is adopted so that the unit is capable of observing all ground and directing fire onto the observed ground. It is typically used in all...


Care must be taken by the ambush commander to ensure that fire from any weapon cannot inadvertently hit any other friendly unit (this is known as crossfire).


Having set up the ambush, the next phase is to wait. This could be for a few hours, or a few days, depending on the tactical and supply situation. It is obviously much harder for an ambush patrol to remain covert and alert if sentry rosters, shelter, sleeping, sanitary arrangements, food and water, have to be considered; so this should be done in a patrol harbour, away from the site chosen for the ambush. Ambush patrols will almost always have to be self-sufficient, as re-supply would not be possible without compromising their position.


The arrival of an enemy in the area should be signalled by one of the cut-off units. This may be done by radio or by some other signal, but the enemy must not detect the signal. If radio silence
Radio silence
In telecommunications, radio silence is a status in which all fixed or mobile radio stations in an area are asked to stop transmitting for safety or security reasons.The term "radio station" may include anything capable of transmitting a radio signal....

 is necessary, the pre-electronic expedient of a cord linking the groups, tugged once or twice as a signal, may be employed. The ambush commander will have given a clear instruction for initiating the ambush. An ambush is ideally initiated by the most effective casualty-producing device available to the attacking elements. This might be a burst from an automatic weapon, or the use of an antipersonnel explosive device (such as a Claymore mine
M18A1 Claymore Antipersonnel Mine
The M18A1 Claymore is a directional anti-personnel mine used by the U.S. military. It was named after the large Scottish sword by its inventor, Norman A. MacLeod...

 or other directional weapon). Some military doctrines call for an ambush to be initiated by a signal from a whistle, though in US practice, whistles are not favored, since they do nothing to inflict damage on the enemy. The ambush commander may judge when the ambush will be most effective, and give the signal manually, or the ambush patrol may rely on tripwire or pressure-detonated mines in the kill zone to initiate firing.

Against vehicles, the lead and rear vehicles are the primary targets; this traps the remaining vehicles in the kill zone for as long as possible. Targets are prioritised to rapidly destroy the target's unit cohesion. It is vital to obtain fire superiority as rapidly as possible, to prevent enemy counter-ambush tactics from being executed. The order of priorities against an enemy infantry unit is the enemy radio operator (in the past identified by the whip aerial of the backpack radio unit such as the British Army's Clansman system), the enemy's unit commander (a more difficult task today when officers and NCOs are dressed and armed in an identical manner to the rest of the infantry squad), and the platoon or section machine-gunner.

After the firefight
Generally, a battle is a conceptual component in the hierarchy of combat in warfare between two or more armed forces, or combatants. In a battle, each combatant will seek to defeat the others, with defeat determined by the conditions of a military campaign...

 has been won, the now compromised ambush patrol must leave the area as soon as it is practical to do so. In hit-and-run operations, especially against superior numbers and forces, the ambush force will begin disengaging even before the firefight has been won. In the past, accepted protocol was to check bodies for intelligence, take prisoners, and 'treat' any wounded enemy. Once this was accomplished, the ambush patrol would then exfiltrate the area by a pre-determined route.

If time has allowed for it, the ambush force will have prepared their exit; for example, placing land mine
Land mine
A land mine is usually a weight-triggered explosive device which is intended to damage a target—either human or inanimate—by means of a blast and/or fragment impact....

s to cover their retreat, with the members of the force making, and following, a safe route through the mines. If possible, a subsidiary ambush may be planned along the exit route to catch pursuing troops, and, if available, the egress may be covered by mortar or artillery fire.


By definition, the ambush contains the element of total surprise; which means the victims of the ambush have no knowledge of how it has been constructed, or of what measures may have been employed to prevent escape. Therefore – and this has been proven by the experience of war – the only likely method of survival is withdrawal from the killing zone "the way you came in". All other routes out of the killing zone may be blocked, and in a very well-planned and well-executed ambush, even the "back door" will have been closed by the time the ambush is sprung. The published military doctrine is "immediate, positive, and offensive action"(ref: FM 55-30 USARMY, also PFN-T8M20024), but this is very likely to have been anticipated by the ones who set the ambush, and often plays into their hands. The value of withdrawal is the preservation of the force to "live to fight another day", when not taken by surprise.


The best way to survive an ambush is not to encounter them. In order for this to happen, patrol movement mustn't be predictable in timing or route, and should avoid the most obvious routes. Rather than moving at a constant speed and direction, the patrol should vary these, with occasional stops to observe both the route ahead, and changes behind. Units should move in such a way that they are close enough together for mutual support, but far enough apart so that one burst of automatic fire wouldn't take out the entire unit. When on foot, if possible, the patrol should move in such a way as to maximise their firepower; for example, with the arrowhead and spearhead formation, they should not allow themselves to be skylined. Units on foot should have a point man some way ahead of the main body, and, if possible, a rearguard as well. Those travelling in vehicles follow the same procedures, with lead and trailing vehicles well ahead of, and well behind, the main body of vehicles.


In the modern day warfare, this is much easier than before, since a route can be sanitized beforehand by aerial assets, and any obvious ambush sites noted, and counter measures taken. During the Soviet war in Afghanistan
Soviet war in Afghanistan
The Soviet war in Afghanistan was a nine-year conflict involving the Soviet Union, supporting the Marxist-Leninist government of the Democratic Republic of Afghanistan against the Afghan Mujahideen and foreign "Arab–Afghan" volunteers...

, Mi-24 Hind  gunships were used to locate concentrations of mujahideen
Mujahideen are Muslims who struggle in the path of God. The word is from the same Arabic triliteral as jihad .Mujahideen is also transliterated from Arabic as mujahedin, mujahedeen, mudžahedin, mudžahidin, mujahidīn, mujaheddīn and more.-Origin of the concept:The beginnings of Jihad are traced...

 guerrilla, and these would then be attacked by the Hinds themselves, or by artillery, using the aircraft as spotters.

See also

  • Ambush techniques and types of ambush, from VietCong and PAVN article
  • Flanking maneuver
    Flanking maneuver
    In military tactics, a flanking maneuver, also called a flank attack, is an attack on the sides of an opposing force. If a flanking maneuver succeeds, the opposing force would be surrounded from two or more directions, which significantly reduces the maneuverability of the outflanked force and its...

  • Flypaper theory (strategy)
    Flypaper theory (strategy)
    In military strategy, the flypaper theory is the idea that it is desirable to draw enemies to a single area where it is easier to kill them and where they are far from one's own vulnerabilities. Perhaps the best description of the benefits of the strategy was given by U.S. Army General Ricardo...

  • List of military tactics
  • Sniper
    A sniper is a marksman who shoots targets from concealed positions or distances exceeding the capabilities of regular personnel. Snipers typically have specialized training and distinct high-precision rifles....

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