Infantry tactics
Infantry tactics
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Infantry tactics

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Infantry tactics

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. (For a wider view of battle and theater tactics see: Military strategy)

Infantry tactics are the oldest method of warfare and span all eras. In different periods, the prevailing technology of the day has had an important impact on infantry tactics. In the opposite direction, tactical methods can encourage the development of particular technologies. Similarly, as weapons and tactics evolve, so do the tactical formations employed, such as the Greek phalanx, the Spanish tercio, the Napoleonic column, or the British 'thin red line'. In different periods the numbers of troops deployed as a single unit can also vary widely, from thousands to a few dozen.

Modern infantry tactics vary with the type of infantry deployed. Armoured and mechanised infantry are moved and supported in action by vehicles, while others may operate amphibiously from ships, or as airborne troops inserted by helicopter, parachute or glider, whereas light infantry may operate mainly on foot. In recent years, peacekeeping operations in support of humanitarian relief efforts have become particularly important. Tactics also vary with terrain. Tactics in urban areas, jungles, mountains, deserts or arctic areas are all markedly different.

The infantry phalanx was a Sumerian tactical formation as far back as the third millennium BC. It was a tightly knit group of hoplites, generally upper and middle-class men, typically eight to twelve ranks deep, armored in helmet, breastplate, and greaves, armed with two-to-three metre (6~9 foot) pikes and overlapping round shields. It was most effective in narrow areas, such as Thermopylae, or in large numbers. Although the early Greeks focused on the chariot, because of local geography, the phalanx was well developed in Greece and had superseded most cavalry tactics by the Greco-Persian Wars. In the fourth century BC Philip II of Macedon reorganized his army, with emphasis on phalanges, and the first scientific military research. Theban and Macedonian tactics were variations focused on a concentrated point to break through the enemy phalanx, following the shock of cavalry. Carefully organized—into tetrarchia of 64 men, taxiarchiae of two tetrarchiae, syntagmatae of two taxiarchiae, chilliarchiae of four syntagmatae, and phalanges of four chilliarchiae, with two chilliarchiae of peltasts and one chilliarchia each of psiloi and epihipparchy (cavalry) attached—and thoroughly trained, these proved exceedingly effective in the hands of Alexander III of Macedon.

However, as effective as the Greek phalanx was, it was inflexible. Rome made their army into a complex professional organization, with a developed leadership structure and a rank system. The Romans made it possible for small-unit commanders to receive rewards and medals for valor and advancement in battle. Another major advantage was a new tactical formation, the manipular legion (adopted around 300BC), which could operate independently to take advantage of gaps in an enemy line, as at the Battle of Pydna. Perhaps the most important innovation was improving the quality of training to a level not seen before. Although individual methods were used by earlier generations, the Romans were able to combine them into an overwhelmingly successful army, able to defeat any enemy for more than two centuries.

On the infantry level, the Roman Army adapted new weapons: the pilum (a piercing javelin), the gladius (a short thrusting sword), and the scutum (a large convex shield) providing protection against most attacks without the inflexibility of the phalanx. Generally, battle would open with a volley of light pila from up to 18 m (20 yd) (and frequently far less), followed by a volley of heavy pila just before the clashing with scuta and gladii. Roman soldiers were trained to stab with these swords instead of slash, always keeping their shields in front of them, maintaining a tight shield-wall formation with their fellow soldiers. To motivate the Roman soldier to come within two metres (6 ft) of his enemy (as he was required to do with the gladius) he would be made a citizen after doing so, upon completion of his term of service. Roman infantry discipline was strict and training constant and repetitive.

The manipular legion was an improvement over the phalanx on which it was based, providing flexibility and responsiveness unequalled before that time. By increasing dispersal, triple that of a typical phalanx, the manipular legion had the unanticipated benefit of reducing the lethality of opposing weapons. Coupled with superb training and effective leaders, the Roman army was the finest in the world for centuries. The army's power on the field was such that its leaders avoided most fortifications, preferring to meet the enemy on open ground. To take an enemy-held fortification, the Roman army would cut off any supply lines, build watchtowers around the perimeter, set up catapults, and force the enemy to attempt to stop them from reducing the fortification's walls to rubble. The Roman army's achievements were carefully carved in stone on Trajan's Column, and are well documented by artifacts strewn about battlefields all over Europe.

After the fall of the Roman Empire, many of the ingenious tactics they used disappeared. Tribes such as the Visigoths and Vandals preferred to simply rush their enemies in a massive horde. These tribes would often win battles against more advanced enemies by achieving surprise and outnumbering their foes. Born out of the partition of the Roman Empire, the Byzantine Empire created an effective military. Its conscripts were well-paid and led by commanders educated in military tactics and history. However, the army mostly relied on cavalry, making the infantry a smaller portion of its overall force.

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