Infantry is a specialization of military personnel who engage in warfare combat. Infantry generally consists of light infantry, irregular infantry, heavy infantry, mountain infantry, motorized infantry, mechanized infantry, airborne infantry, air assault infantry, and naval infantry. Other types of infantry, such as line infantry and mounted infantry, were once commonplace but fell out of favor in the 1800s with the invention of more accurate and powerful weapons.
The Roman legion, the largest military unit of the Roman army, was composed of Roman citizens serving as legionaries. During the Roman Republic the manipular legion comprised 4,200 infantry and 300 cavalry. After the Marian reforms in 107 BC the legions were formed of 5,200 men and were restructured around 10 cohorts, the first cohort being double strength. This structure persisted throughout the Principate and middle Empire, before further changes in the fourth century resulted in new formations of around 1,000 men.
The Roman legionary was a citizen soldier of the Roman army. These soldiers would conquer and defend the territories of ancient Rome during the late Republic and Principate eras, alongside auxiliary and cavalry detachments. At its height, Roman legionaries were viewed as the foremost fighting force in the Roman world, with commentators such as Vegetius praising their fighting effectiveness centuries after the classical Roman legionary disappeared.
Legio I Germanica,, was a legion of the Imperial Roman army, possibly founded in 48 BC by Julius Caesar to fight for him in the civil war against Pompey. The title germanic is a reference to its service in the Germanic Wars, rather than the place of origin of its soldiers. After the Revolt of the Batavi, the remaining men of the Germanica were added to Galba's seventh legion, which became VII Gemina. The emblem of Legio I is unknown, but it was probably Taurus, like all the other legions levied by Caesar.
A cohort was a standard tactical military unit of a Roman legion. Although the standard size changed with time and situation, it was generally composed of 480 soldiers. A cohort is considered to be the equivalent of a modern military battalion. The cohort replaced the maniple. From the late second century BC and until the middle of the third century AD, ten cohorts made up a legion. Cohorts were named "first cohort", "second cohort", etc. The first cohort consisted of experienced legionaries, while the legionaries in the tenth cohort were less experienced.
In the Roman Republic and the Roman Empire, the Latin word castrum was a military-related term. In Latin usage, the singular form castrum meant 'fort', while the plural form castra meant 'camp'. The singular and plural forms could refer in Latin to either a building or plot of land, used as a fortified military base. In English usage, castrum commonly translates to "Roman fort", "Roman camp" and "Roman fortress". However, scholastic convention tends to translate castrum as "fort", "camp", "marching camp" or "fortress".
The Roman army was the armed forces deployed by the Romans throughout the duration of Ancient Rome, from the Roman Kingdom to the Roman Republic and the Roman Empire, and its medieval continuation, the Eastern Roman Empire. It is thus a term that may span approximately 2,206 years, during which the Roman armed forces underwent numerous permutations in size, composition, organisation, equipment and tactics, while conserving a core of lasting traditions.
In the Roman army during classical antiquity, a centurion, was a commander, nominally of a century, a military unit originally consisting of 100 legionaries. The size of the century changed over time; from the 1st century BC through most of the imperial era it was reduced to 80 men.
Centuria is a Latin term denoting military units originally consisting of 100 men. The size of the centuria changed over time, and from the first century BC through most of the imperial era the standard size of a centuria was 100 men. By the time of Roman Empire, ordo became a synonym of centuria.
The military of ancient Rome was one of largest pre-modern professional standing armies that ever existed. At its height, protecting over 7,000 kilometers of border and consisting of over 400,000 legionaries and auxiliaries, the army was the most important institution in the Roman world. According to the Roman historian Livy, the military was a key element in the rise of Rome over "above seven hundred years" from a small settlement in Latium to the capital of an empire governing a wide region around the shores of the Mediterranean, or, as the Romans themselves said, mare nostrum, "our sea". Livy asserts:
The auxilia were introduced as non-citizen troops attached to the citizen legions by Augustus after his reorganisation of the Imperial Roman army from 27 BC. By the 2nd century, the Auxilia contained the same number of infantry as the legions and, in addition, provided almost all of the Roman army's cavalry and more specialised troops. The auxilia thus represented three-fifths of Rome's regular land forces at that time. Like their legionary counterparts, auxiliary recruits were mostly volunteers, not conscripts.
The lancea was a javelin used in ancient Rome. According to the Oxford English Dictionary, the word originally came from the Celtiberian language, also cf. λόγχη (lonche), the Greek term for lance. One kind of lancea, possibly known as the lancea pugnatoria or "the fighting lance" was used as a thrusting weapon by cavalrymen. This weapon was used by cavalrymen as it was lighter and easier to use than the pilum. The lancea was also used by auxiliaries. legionaries would use the lancea if the occasion called for it. Arrian equipped his army with the weapon during a battle with the Alans. Soldiers that used it were known as lancearii. It is unclear how the lancea was distinguished from the hastae. Many lancea had amenta, although not all. This kind of javelin also had short wooden shafts and small leaf-shaped metal heads. Sometimes the heads had elongated points which may have been used to increase the penetration of the spear.
In the Roman army of the late Republic and the Principate, the tribunus laticlavius was one of the six military tribunes in a legion. Usually, it consisted of young men around age 20 who belonged to a wealthy family or were friends with the legate. The position of tribunus laticlavius was the first step on the Cursus honorum. Tribunus laticlavius are typically depicted wearing a purple cloak.
Decanus means "chief of ten" in Late Latin. The term originated in the Roman army and became used thereafter for subaltern officials in the Byzantine Empire, as well as for various positions in the Church, whence derives the English title "dean". It is unrelated to the position of deacon.
The Imperial Roman Army was the military land force of the Roman Empire from 27 BC to 476 AD, and the final incarnation in the long history of the Roman army. This period is sometimes split into the Principate and the Dominate (284–476) periods.
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.
The honesta missio was the honorable discharge from the military service in the Roman Empire. The status conveyed particular privileges. Among other things, an honorably discharged legionary was paid discharge money from a treasury established by Augustus, the aerarium militare, which amounted to 12,000 sesterces for the common soldier and around 600,000 sesterces for the primus pilus until the Principate of Caracalla.
In ancient Rome, contubernium was a quasi-marital relationship between two slaves or between a slave (servus) and a free person who was usually a former slave or the child of a former slave. A slave involved in such a relationship was called contubernalis, the basic and general meaning of which was "companion".
A Biarchus was a military position in the army of the Late Roman Empire. It was created after the military reforms of Diocletian. They are found throughout a variety of military positions in the Roman military. The Code of Justinian mentions the position of Biarchus as part of the Agentes in Rebus, which were the Imperial couriers. The name Biarchus is also found in the scholae palatina, auxilia palatina, fabricae, vexillationes, and in the stratores. Their duties are unknown, but they may have related to food supply. The biarchus was subordinate to the centenarius and the ducenarius but above the circitor in the command structure of the Roman military. This position replaced the role of the Optio.
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