
Armour or armor is a covering used to protect an object, individual, or vehicle from physical injury or damage, especially direct contact weapons or projectiles during combat, or from a potentially dangerous environment or activity. Personal armour is used to protect soldiers and war animals. Vehicle armour is used on warships, armoured fighting vehicles, and some mostly ground attack combat aircraft.

A cataphract was a form of armored heavy cavalryman that originated in Persia and was fielded in ancient warfare throughout Eurasia and Northern Africa.

Ashigaru were infantry employed by the samurai class of feudal Japan. The first known reference to ashigaru was in the 14th century, but it was during the Ashikaga shogunate that the use of ashigaru became prevalent by various warring factions.

Plate armour is a historical type of personal body armour made from bronze, iron, or steel plates, culminating in the iconic suit of armour entirely encasing the wearer. Full plate steel armour developed in Europe during the Late Middle Ages, especially in the context of the Hundred Years' War, from the coat of plates worn over mail suits during the 14th century.

Lamellar armour is a type of body armour, made from small rectangular plates of iron or steel, leather (rawhide), or bronze laced into horizontal rows. Lamellar armour was used over a wide range of time periods in Central Asia, Eastern Asia, Western Asia, and Eastern Europe. The earliest evidence for lamellar armour comes from sculpted artwork of the Neo-Assyrian Empire in the Near East.

A brigandine is a form of body armour from the Middle Ages. It is a garment typically made of heavy cloth, canvas, or leather, lined internally with small oblong steel plates riveted to the fabric, sometimes with a second layer of fabric on the inside.

Korean armor is armor that was traditionally used in ancient times by Koreans, those fighting in and on behalf of Korea, or Koreans fighting overseas. Examples of armor from the Korean Peninsula date back to at least the Korean Three Kingdoms period. Depending on the tactical situation, Korean armor also included horse armor and other kinds of early anti-ballistic armor before the 20th century.

Scale armour is an early form of armour consisting of many individual small armour scales (plates) of various shapes attached to each other and to a backing of cloth or leather in overlapping rows. Scale armour was worn by warriors of many different cultures as well as their horses. The material used to make the scales varied and included bronze, iron, steel, rawhide, leather, cuir bouilli, seeds, horn, or pangolin scales. The variations are primarily the result of material availability.

Heavy cavalry was a class of cavalry intended to deliver a battlefield charge and also to act as a tactical reserve; they are also often termed shock cavalry. Although their equipment differed greatly depending on the region and historical period, heavy cavalry were generally mounted on large powerful warhorses, wore body armor, and armed with either lances, swords, maces, flails (disputed), battle axes, or war hammers; their mounts may also have been protected by barding. They were distinct from light cavalry, who were intended for scouting, screening, and skirmishing.

Heavy infantry consisted of heavily armed and armoured infantrymen who were trained to mount frontal assaults and/or anchor the defensive center of a battle line. This differentiated them from light infantry who are relatively mobile and lightly armoured skirmisher troops intended for screening, scouting, and other tactical roles unsuited to soldiers carrying heavier loads. Heavy infantry typically made use of dense battlefield formations, such as shield wall or phalanx, multiplying their effective weight of arms with force concentration.
Historically, Chinese swords are classified into two types, the jian and the dao. A Jian is a straight, double-edged sword mainly used for stabbing, and has been commonly translated into the English language as a longsword; while a dao is a single-edged sword mainly used for cutting, and has been translated as a saber or a "knife".

A coat of plates is a form of segmented torso armour consisting of overlapping metal plates riveted inside a cloth or leather garment. The coat of plates is considered part of the era of transitional armour and was normally worn as part of a full knightly harness. The coat saw its introduction in Europe among the warring elite in the 1180s or 1220s and was well established by the 1250s. It was in very common usage by the 1290s. By the 1350s it was universal among infantry militias as well. After about 1340, the plates covering the chest were combined to form an early breastplate, replacing the coat of plates. After 1370, the breastplate covered the entire torso. Different forms of the coat of plates, known as the brigandine and jack of plates, remained in use until the late 16th century.

Mail and plate armour is a type of mail with embedded plates. Armour of this type has been used in the Middle East, North Africa, Ottoman Empire, Japan, China, Korea, Vietnam, Central Asia, Greater Iran, India, Eastern Europe, and Nusantara.

Tibetan culture has a long history of producing armor for military and ceremonial use. Tibetan armor came in many forms, and was produced into the 20th century due to the isolation of the Tibetan Plateau.

Armor in the Indian subcontinent was used since antiquity. Its earlier reference is found in the vedic period. Armor has been described in religious texts; including the Itihasa epics Ramayana and Mahabharat, as well as in the Puranas.

The military of the Warring States refers primarily to the military apparatuses of the Seven Warring States which fought from around 475 BC to 221 BC when the state of Qin conquered the other six states, forming China's first imperial dynasty, the Qin dynasty.

The military history of the Northern and Southern dynasties encompasses the period of Chinese military activity from 420 to 589. Officially starting with Liu Yu's usurpation of the Jin throne and creation of his Liu Song dynasty in 420, it ended in 589 with the Sui dynasty's conquest of Chen dynasty and reunification of China proper. The first of the Northern dynasties did not however begin in 420, but in 386 with the creation of Northern Wei. Thus there is some unofficial overlap with the era of the Sixteen Kingdoms.

The military history of the Sui and Tang dynasties encompasses the period of Chinese military activity from 581 to 907. Although the Sui dynasty (581–618) preceded the Tang (618–907), it was extremely short lived, ending in 618. The two dynasties share many similar trends and behaviors in terms of military tactics, strategy, and technology. It can therefore be viewed that the Tang continued the Sui tradition, or that the Sui set the precedent for the Tang dynasty.

Armour in the 18th century was minimalist and restricted almost entirely to cavalry, primarily to cuirassiers and, to a lesser degree, carabiniers and dragoons. Armour had been in rapid decline since the Thirty Years War, although some archaisms had lingered on into the early years of the 18th century, like Austrian cuirassiers with buff coats and lobster-tailed helmets or Hungarian warriors with mail armour and shields. With the exception of Poland-Lithuania, which still made use of hussars wearing suits of plate armour, armour in Europe was primarily restricted to a front- and backplate, the cuirass, and a simple iron skull cap worn under the hat. By the later 18th century, there were two contradicting developments. Many cuirassier regiments were discarding their cuirasses, while helmets in the form of so-called dragoon helmets, made of brass or leather, made a comeback among the cavalry and infantry.

The Joseon Army was the army of the Korean dynasty of Joseon. The army defended the northern borders but seldom defended the southern regions. The army was best known for fending off the Jurchen raids and conquering the Korean peninsula. However, Joseon's neo-confucianism disavowed military development, causing them to be vulnerable to Japanese and Manchu invasions. Despite this, Joseon kept strengthening the army until the 19th century, when western powers and the Japanese forced them to open doors and modernize the army.