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In military tactics, a flanking maneuver is a movement of an armed force around an enemy force's side, or flank, to achieve an advantageous position over it. [1] Flanking is useful because a force's fighting strength is typically concentrated in its front, therefore, to circumvent an opposing force's front and attack its flank is to concentrate one's own offense in the area where the enemy is least able to concentrate defense.
Flanking can also occur at the operational and strategic levels of warfare.
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The flanking maneuver is a basic military tactic with several variations. Flanking an enemy entails attacking from one or more sides, at an angle to the enemy's direction of engagement. There are three standard flanking maneuvers.
The first maneuver is the ambush, where a unit performs a surprise attack from a concealed position. Units friendly to the ambushing unit may be hidden to the sides of the ambush site to surround the enemy, but care must be taken in setting up fields of fire to avoid friendly fire. Ambush as a tactic is typically favored by smaller, more mobile forces, usually ones with favorable terrain. An example of this would be the Battle of Beaver Dams, where the British ambushed the Americans, halting their advance further inland to Canada.
The second type is used during an attack, where a unit encounters an enemy defensive position. Upon receiving fire from the enemy, the unit commander may decide to order a flank attack. A part of the attacking unit pins the enemy in place with suppressive fire, preventing them from returning fire, retreating or changing position to meet the flank attack. The flanking force then advances to the enemy flank and attacks them at close range. Coordination to avoid friendly fire is also important in this situation. This is employed largely by forces meeting each other with equal strength.
The third form of flanking maneuvers is the double envelopment, which involves simultaneous flank attacks on both sides of the enemy. An example is Hannibal's victory over the Roman army at the Battle of Cannae. Double envelopment can only be performed by widening friendly units or formations or opening gaps between them which results in weakening the center and similar battles to that of Gaugamela. Thus, it was often employed when severely outnumbering the opponent or against those without sufficient cavalry support.
Flanking on land in the pre-modern era was usually achieved with cavalry (and rarely, chariots) due to their speed and maneuverability, while heavily armored infantry was commonly used to pin the enemy in place, as in the Battle of Pharsalus. Armored vehicles such as tanks replaced cavalry as the main force of flanking maneuvers in the 20th century, as seen in the Battle of France in World War II.
The use of flanking has been a consistent part of warfare since its invention. The responsibility of defending against flanks falls on the commander, who has to make the choice of how to best use terrain. In addition, the proper adjustment and positioning of soldiers is imperative in ensuring a protected flank.
A commander could prevent being flanked by anchoring one or both parts of his line on terrain impassable to his enemies, such as gorges, lakes or mountains. Notable examples of this being the Spartans at the Battle of Thermopylae, Hannibal at the Battle of Lake Trasimene, and the Romans at the Battle of Watling Street. Although not strictly impassable, woods, forests, rivers, uneven, and marshy ground can also be used to anchor a flank: Henry V at Agincourt. However, in such instances, it was still wise to have skirmishers covering the flanks.
In exceptional circumstances, an army may be fortunate enough to be able to anchor a flank with a friendly castle, fortress, or walled city. In such circumstances, it was necessary not to fix the line to the fortress but to allow a killing space between the fortress and the battle line so that any enemy forces attempting to flank the field forces could be brought under fire from the garrison. Natural strongholds formed by terrain can also be incorporated into the battle line: the Union positions of Culp's Hill, Cemetery Hill on the right flank, and Big Round Top and Little Round Top on the left flank at the Battle of Gettysburg. If time and circumstances allowed, field fortifications could be created or expanded to protect the flanks, as the Allied forces did with the hamlet of Papelotte and the farmhouse of Hougoumont on the left and right flanks at the Battle of Waterloo.
When the terrain favors neither side, it is down to the disposition of forces in the battle line to prevent flanking attacks. As long as they have had a place on the battlefield, it was the role of cavalry to be placed on the flanks of the infantry battle line. With speed and greater tactical flexibility, the cavalry could both make flanking attacks and guard against them. It was the marked superiority of Hannibal's cavalry at the Battle of Cannae that allowed him to chase off the Roman cavalry and complete the encirclement of the Roman legions. With equally-matched cavalry, commanders have been content to allow inaction, with the cavalry of both sides preventing the other from action.
In a case of no cavalry, inferior cavalry or in armies whose cavalry had gone off on their own (a common complaint), the lack of resulting advantage left the outcome depending on the disposition of the infantry to guard against flanking attacks. It was the danger of being flanked by the numerically superior Persians that led Miltiades to lengthen the Athenian line at the Battle of Marathon by decreasing the depth of the centre. The importance of the flank positions led to the practise, which became tradition of placing the best troops on the flanks. At the Battle of Platea, the Tegeans squabbled with the Athenians on who should have the privilege of holding a flank; [2] both having conceded the honour of the right flank (the critical flank in the hoplite system) to the Spartans. That is the source of the tradition of giving the honour of the right to the most senior regiment present, which has persisted into the modern era.
With troops confident and reliable enough to operate in separate dispersed units, the echelon formation may be adopted. That can take different forms with either equally strong "divisions" or a massively reinforced wing or centre supported by smaller formations in step behind it (forming either a staircase like, or arrow like arrangement). When the foremost unit engages with the enemy the echeloned units remain out of action. The idea is for the enemy to attack the exposed flanks of the foremost unit, but the units immediately echeloned behind the foremost unit would then push forward taking the flankers themselves in the flank. If the echeloned unit is being attacked in turn, the unit behind it would move forward to again attack the flanks of the would be flankers. In theory a cascade of such engagements could occur all along the line for as many units as there were in echelon. In practice, that almost never happened since most enemy commanders saw it for what it was and so resisted the temptation of the initial easy flanking attack.
That prudence was used in the manifestation of the oblique order in which one wing was massively reinforced, creating a local superiority in numbers that could obliterate that part of the enemy line that it was sent against. The weaker echeloned units was sufficient to fix the greater portion of the enemy troops into inaction. With the battle on the wing won, the reinforced flank would turn and roll up the enemy battle line from the flank.
In the Roman chequer board formation, readopted by Renaissance militaries, each of the units in the front line could be thought of as having two lines of units echeloned behind it.
As warfare increased in size and scope and armies increased, armies could no longer hope to have a contiguous battle line. To be able to maneuver, it was necessary to introduce intervals between units and these intervals could be used to flank individual units in the battle line by fast acting-units such as cavalry. To guard against that, the infantry subunits were trained to be able to form squares rapidly that gave the cavalry no weak flank to attack. During the age of gunpowder, intervals between units could be increased because of the greater reach of the weapons, which raised the possibility of cavalry finding a gap in the line to exploit. Thus, the mark of good infantry was the rapid ability to form from line to square and back again.
On an operational level army, commanders may attempt to flank and wrong foot entire enemy armies, rather than just being content with doing so at a tactical battalion or brigade level. The most infamous example of such an attempt was the modified Schlieffen Plan used by the Germans during the opening stages of the First World War. That was an attempt to avoid facing the French armies head on, but instead flank them by swinging through neutral Belgium.
Just as at the tactical level, where a commander can attempt to anchor his flanks, commanders try to do the same at the operational level. Examples are the Second World War's German Winter Line in Italy anchored by the Tyrrhenian and Adriatic Seas and the trench systems of the Western Front which ran from the North Sea to the Alps. Attacking such positions would be expensive in casualties and more than likely lead to stalemate. Flanking attacks into areas outside the main zone of contention might be attempted to break the stalemates.
If successful, such operations can be shattering, such as at the Inchon, and break into lightly held rear echelons of an enemy when its front line forces are committed elsewhere. Even when they are not entirely successful, such as at Anzio, the operations can relieve pressure on troops on the main battle front by forcing the enemy to divert resources to contain the new front.
The operations may have strategic objectives such as the Invasion of Italy itself, the Gallipoli, and the Normandy landings.
Such a strategy is not new, as Hannibal attacked Rome by going over the Alps, rather than taking the obvious route. In return, Scipio Africanus was able to defeat Hannibal not by trying to face him in Italy but by first undermining his power base in Iberia and then attacking his home city, Carthage.
Flank attacks on the strategic level are seen when a nation or group of nations surround and attack an enemy from two or more directions, such as the Allies surrounding Nazi Germany in World War II. In those cases, the flanked country usually has to fight on two fronts at once, placing it at a disadvantage.
The danger of being strategically flanked has driven the political and diplomatic actions of nations even in peacetime. For example, the fear of being strategically flanked by the other in The Great Game between the British and the Russian Empires led to the expansion of both of them into China and the British eastwards into South-East Asia. The British feared that British India would be surrounded by a Persian and Central Asia satellite to Russia in the west and north and a Russian-dominated China in the east. A China under British influence would mean that the Russians would be penned in from the south and the east. Initially, the Russians were more successful than the British in gaining territorial concessions in China, but the British were able to counteract that by cultivating the emerging Empire of Japan as a counterweight to the Russians, a relationship that culminated in the Anglo-Japanese Alliance.
The Cold War had its own Great Game, with the US and USSR competing for influence in Europe, Asia, Africa and Latin America. The division of Europe, the proxy wars in Asia, and events like the Cuban Missile Crisis were all of great strategic importance to the two competing hegemonies.
An ambush is a surprise attack carried out by people lying in wait in a concealed position. The concealed position itself or the concealed person(s) may also be called an "ambush". Ambushes as a basic fighting tactic of soldiers or of criminals have been used consistently throughout history, from ancient to modern warfare. The term "ambush" is also used in animal behavior studies, journalism, and marketing to describe methods of approach and strategy.
Combined arms is an approach to warfare that seeks to integrate different combat arms of a military to achieve mutually complementary effects—for example, using infantry and armour in an urban environment in which each supports the other.
The Battle of Cannae was a key engagement of the Second Punic War between the Roman Republic and Carthage, fought on 2 August 216 BC near the ancient village of Cannae in Apulia, southeast Italy. The Carthaginians and their allies, led by Hannibal, surrounded and practically annihilated a larger Roman and Italian army under the consuls Lucius Aemilius Paullus and Gaius Terentius Varro. It is regarded as one of the greatest tactical feats in military history and one of the worst defeats in Roman history, and it cemented Hannibal's reputation as one of antiquity's greatest tacticians.
The pincer movement, or double envelopment, is a military maneuver in which forces simultaneously attack both flanks (sides) of an enemy formation. This classic maneuver has been important throughout the history of warfare.
A frontal assault is a military tactic which involves a direct, full-force attack on the front line of an enemy force, rather than to the flanks or rear of the enemy. It allows for a quick and decisive victory, but at the cost of subjecting the attackers to the maximum defensive power of the enemy; this can make frontal assaults costly even if successful, and often disastrously costly if unsuccessful. It may be used as a last resort when time, terrain, limited command control, or low troop quality do not allow for any battlefield flexibility. The risks of a frontal assault can be mitigated by the use of heavy supporting fire, diversionary attacks, the use of cover, or infiltration tactics.
Skirmishers are light infantry or light cavalry soldiers deployed as a vanguard, flank guard or rearguard to screen a tactical position or a larger body of friendly troops from enemy advances. They are usually deployed in a skirmish line, an irregular open formation that is much more spread out in depth and in breadth than a traditional line formation. Their purpose is to harass the enemy by engaging them in only light or sporadic combat to delay their movement, disrupt their attack, or weaken their morale. Such tactics are collectively called skirmishing.
Maneuver warfare, or manoeuvre warfare, is a military strategy which emphasizes movement, initiative and surprise to achieve a position of advantage. Maneuver seeks to inflict losses indirectly by envelopment, encirclement and disruption, while minimizing the need to engage in frontal combat. In contrast to attrition warfare where strength tends to be applied against strength, maneuver warfare attempts to apply strength against weakness in order to accomplish the mission.
A pitched battle or set-piece battle is a battle in which opposing forces each anticipate the setting of the battle, and each chooses to commit to it. Either side may have the option to disengage before the battle starts or shortly thereafter. A pitched battle is not a chance encounter such as a meeting engagement, or where one side is forced to fight at a time not of its choosing such as happens in a siege or an ambush. Pitched battles are usually carefully planned to maximize one's strengths against an opponent's weaknesses and use a full range of deceptions, feints, and other manoeuvres. They are also planned to take advantage of terrain favourable to one's force. Forces strong in cavalry, for example, will not select swamp, forest, or mountain terrain for the planned struggle. For example, Carthaginian General Hannibal selected relatively flat ground near the village of Cannae for his great confrontation with the Romans, not the rocky terrain of the high Apennines. Likewise, Zulu Commander Shaka avoided forested areas or swamps, in favour of rolling grassland, where the encircling horns of the Zulu Impi could manoeuvre to effect. Pitched battles continued to evolve throughout history as armies implemented new technology and tactics.
Deep operation, also known as Soviet deep battle, was a military theory developed by the Soviet Union for its armed forces during the 1920s and 1930s. It was a tenet that emphasized destroying, suppressing or disorganizing enemy forces not only at the line of contact but also throughout the depth of the battlefield.
Infantry tactics are the combination of military concepts and methods used by infantry to achieve tactical objectives during combat. The role of the infantry on the battlefield is, typically, to close with and engage the enemy, and hold territorial objectives; infantry tactics are the means by which this is achieved. Infantry commonly makes up the largest proportion of an army's fighting strength, and consequently often suffers the heaviest casualties. Throughout history, infantrymen have sought to minimise their losses in both attack and defence through effective tactics.
The oblique order is a military tactic whereby an attacking army focuses its forces to attack a single enemy flank. The force commander concentrates the majority of their strength on one flank and uses the remainder to fix the enemy line. This allows a commander with weaker or equal forces to achieve a local superiority in numbers. The commander can then try to defeat the enemy in detail. It has been used by numerous successful generals. Oblique order requires disciplined troops able to execute complex maneuvers in varied circumstances.
Hasty attack is a specific form of attack identified within United States and Canadian military doctrine, in which upon contact with the enemy that is unprepared a unit decides to conduct an attack with limited planning and coordination and with rapid preparation and execution to exploit the enemy's weakness. Though applicable to infantry operations historically and in modern times, hasty attacks are a hallmark of mechanized force operations. During the Civil War, the command for a hasty attack was "sally forth".
The Battle of Hannut was a Second World War battle fought during the Battle of Belgium which took place between 12 and 14 May 1940 at Hannut in Belgium. It was the largest tank battle in the campaign. It was also the largest clash of tanks in armoured warfare history at the time.
Mobile defense is a manoeuvre by military units that repulses an attack by the use of well-planned counter-attacks by the defender, which seeks to avoid a pitched battle.
VC and PAVN battle tactics comprised a flexible mix of guerrilla and conventional warfare battle tactics used by Viet Cong (VC) and the North Vietnamese People's Army of Vietnam (PAVN) to defeat their U.S. and South Vietnamese (GVN/ARVN) opponents during the Vietnam War.
The Battle of Kumanovo, on 23–24 October 1912, was a major battle of the First Balkan War. It was an important Serbian victory over the Ottoman army in the Kosovo Vilayet, shortly after the outbreak of the war. After this defeat, the Ottoman army abandoned the major part of the region, suffering heavy losses in manpower and in war materiel.
The hammer and anvil is a military tactic involving the use of two primary forces, one to pin down an enemy, and the other to smash or defeat the opponent with an encirclement maneuver. It may involve a frontal assault by one part of the force, playing a slower-moving or more static role. The second phase involves a more mobile force that maneuvers around the enemy and attacks from behind or the flank to deliver a decisive blow.
Roman infantry tactics are the theoretical and historical deployment, formation, and manoeuvres of the Roman infantry from the start of the Roman Republic to the fall of the Western Roman Empire. The focus below is primarily on Roman tactics: the "how" of their approach to battle, and how it stacked up against a variety of opponents over time. It does not attempt detailed coverage of things like army structure or equipment. Various battles are summarized to illustrate Roman methods with links to detailed articles on individual encounters.
In military tactics, a flanking maneuver, or flanking manoeuvre, 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 ability to defend itself.