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Heavy infantry

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Title: Heavy infantry  
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Subject: Infantry, Iberian ship development, 1400–1600, Shock tactics, 1987 Lieyu massacre, Imperial Roman army
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Heavy infantry

Heavy infantry refers to heavily armed and armoured ground troops, as opposed to medium or light infantry, in which the warriors are relatively lightly armoured. As modern infantry troops usually define their subgroups differently (such as by weapon or type of attack), 'heavy infantry' almost always is used to describe pre-gunpowder age troops.

History of the heavy infantry


Ancient Greece

In ancient Greece the Hoplite was a common form of heavy infantry. All hoplites had a shield and spear, and perhaps a helmet as well. Wealthier hoplites were able to afford bronze breastplate or linothorax armor, while poorer hoplites wore little to no armor. The hoplite armor and shield were designed to block arrows and blows from spear points and swords. Hoplites would act as both a city watch and as an army in the field. Hoplites were thought of as a force to be reckoned with because they would form a phalanx, a tight band of spearmen, which aided them against lighter infantry and cavalry.

Hellenistic Successor States

Alexander's army employed infantry known as the phalangite - soldiers equipped with a small shield and long pike, and employed in a formation known as the sarissa phalanx. Alexander also had a flexible heavy infantry force known as the Argyraspides, or silver shields, who also acted as his elite infantry. Post-Alexander Hellenistic States such as the Macedonians, Seleucids, Ptolemies, etc. would employ more heavily armored phalangites, as well as their own variation of elite units such as the silver shields.


The Celts were a diverse group of people that through migration, lived in an area stretching from the British Isles to Anatolia. A people with a strong warrior tradition, they varied greatly in battle and equipment (see Celtic warfare). Some of the heavier armed Celts wore chainmail, "Galea" type helmets, and threw javelins in battle - all of these elements were later adopted by the Romans. Celts were respected for their battle prowess and often served as mercenaries for other Mediterranean civilizations.


Roman re-enactors demonstrate a variant of the Roman testudo formation

In the Military of ancient Rome, heavy infantry made up most of the Roman army. The heavy infantry of the pre-Marian Roman republic included the Hastati, Principes, and Triarii. (although depending how the hastati was armed and armored, it could also be considered light infantry) The hastati, the youngest men in the line, were armed with a sword, or gladius, and two javelins, or pila. The pila (singular pilum) were usually thrown at a charging enemy before they were engaged in hand-to-hand combat. Hastati were also equipped with a helmet, a shield and a bronze breast plate or coat of mail (if they could afford it). The principes were armed just like the hastati, but they were older, more experienced and, because they had more money, were more likely to own better-quality arms. The final type of heavy infantry were the triarii. They were armed and armored just like the hastati except that instead of holding pila to throw at the enemy, they used a large spear known as the hasta. Incidentally, the hastati were originally armed with this weapon, which gave them their name, but the hasta were eventually abandoned except by the triarii. The triarii were usually called in to end the battle and break the lines of the enemy. Rome's use of heavy infantry and a general lack of major cavalry forces meant they were stronger in pitched battle but more vulnerable to ambushes. After the Marian reforms of the late 2nd century BCE, property requirements were dropped and the three-lined maniples were replaced in favor of a single type of heavy infantry, the legionary, all equipped in nearly identical fashion to hastati and principes.

Early Imperial East Asia

Following the introduction of infantry tactics during the Warring States period, the Qin army developed an infantry force that would help it conquer the other states. Soldiers fulfilling the role of heavy infantry usually wore lacquered leather (and sometimes bronze) coat of plates or lamellar, and were equipped with spears and wooden shields, dagger-axes and large bronze shields, or swords and smaller bronze shields. Some soldiers were also equipped with very long spears or pikes, and fought in a formation akin to Swiss pikemen. The Han Dynasty that succeeded the Qin era would equip their soldiers with iron armor, which they were able to mass-produce due to state standardized metallurgical improvements. Unlike their contemporaries such as the post-Marian Romans, the Han military did not rely primarily on their heavy infantry, but emphasized a more balanced force of infantry, missile troops, and cavalry.

The kingdom of Goguryeo in Korea was renowned for its military power and influence, especially during the rule of Gwanggaeto the Great. The rapid expansion of Goguryeo into Manchuria and parts of eastern China can be accredited to the skill and discipline of the Goguryeo heavy infantry and cavalry. Soldiers were typically equipped with iron swords, pole-arms, and bows. Warriors were usually clad in iron lamellar armor or lacquered leather to ward off arrows and sword blows. The weapons and armor of the heavy infantry of Goguryeo were considered the best in quality, due to the advanced technological improvements made in steel and iron production in Korea. Not much is known about the actual battle formations used in Korean armies during the Goguryeo era, but accounts of the individual expertise and prowess of the Goguryeo soldiers, as well as the strict regimentation of Goguryeo's armies, indicates that there must have been some balance between group combat and individual combat. Despite strides made in infantry warfare, Goguryeo also placed great emphasis on the usage of heavy cavalry, sometimes almost exclusively using horsemen for shock attacks, with infantrymen coming in after the initial cavalry charge. Meticulous development and implementation of efficient swordsmanship and martial arts, tactics, and technology allowed Goguryeo armies to remain virtually undefeated during the height of its existence.

Middle Ages

Medieval Coat of Arms of king Matthias Corvinus (r. 1458-1490), guarded by Black Army heavy infantry men. Matthias Church, Budapest. The damaged art relic was renovated in 1893.

It's a misconception that all of the Medieval Period was dominated by heavy cavalry, as this trend began only after the 10th Century. For centuries after the fall of the Western Roman Empire in 476 AD, heavy infantry was still favored in Western and Central European warfare, by the Franks, Visigoths, Anglo-Saxons and by the Arabs that invaded Spain. Only after the Carolingian Period and the rise of the Normans in the affairs of Western Europe we see a shifting trend in the course of warfare (i.e. Battle of Lechfeld, Battle of Hastings). With the proliferation and consolidation of the concept of chivalry, much focus was given to the knight as the central figure in warfare, nevertheless it's a false assumption that heavy infantry became obsolete during the period, as evidenced by the Scottish and Irish wars against the English, by the Flemish and Italian citizen-militias, and by the Byzantine methods of war (which was based on the Roman Legionnary and Greek Hoplite models, see Skoutatoi). While the trend in Eastern Europe beyond the Dnieper among the nomadic peoples like the Pechenegs and Kypchaks was essentially based on the archer cavalry, the peoples of modern Ukraine and western Russia favored a mix of heavy infantry and Asian-style cavalry warfare. Peoples like the Hungarians, Poles and Bulgarians gradually abandoned their native ways of warfare in favor of imitating the Western European Knights or Byzantine Heavy Cavalry.

All of this would change with the introduction of gunpowder in Europe in the late 14th century, and the highly successful and innovating pikemen tactics pioneered by the Swiss mercenaries led to the increased preference for mostly infantry professional armies. Gunpowder and the skillful use of the pike would give birth to the Middle Age heavy infantry and place it on a equal footing with cavalry. Heavy infantry would usually be armored like a knight with mail armor and an iron helmet, and would carry a pike. Other heavy infantry would probably be armed with little armor and a gunpowder weapon, which were capable of penetrating armor. The introduction of such weapons as gunpowder and the pike resulted in the reintroduction of the infantry into armies and shifted dominance of the battlefield away from the knights.

The Industrial era and beyond

Arguably, the modern successor of heavy infantry would be mechanised infantry equipped with armored personnel carriers (APCs), or infantry fighting vehicles (IFVs). Unlike their predecessors of yesteryear who were unable to keep up with cavalry on mobile operations, modern mechanised infantry, with all-terrain armoured vehicles, can easily keep up with heavy tank units and support them as powerful combined-arms forces to exploit any fast moving mobile operations. This advancement in technology resulted in a significant increase in combat power and has become an effective force multiplier for infantry forces in modern mechanised warfare.

In addition to mobility and protection, most modern APCs and IFVs also provide limited fire support for the soldiers they carry into combat. Fire support weapons such as machine guns, autocannons, small-bore direct-fire howitzers, and even anti-tank guided missiles are often mounted directly on the infantry's own transport vehicles.

Many APCs and IFVs currently under development are intended for rapid deployment by aircraft. New technologies which promise reduction in weight, such as electric drive, may be incorporated. However, facing a similar threat in Post-invasion Iraq to that which prompted the Russians to convert tanks to APCs, the occupying armies have found it necessary to apply extra armor to existing APCs and IFVs, which adds to the overall size and weight. Some of the latest designs (such as the German Puma) are intended to allow a light, basic vehicle which is air-transportable to be fitted in the field with additional protection, thereby ensuring both strategic flexibility and survivability.

See also

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