The Cavalry (from French cavalerie) is the second oldest of the Combat Arms, and as soldiers or warriors who fought mounted on horseback in combat, it represents the mobility and offensive power of the armed forces. The designation was not usually extended to any military force that used other animals, such as camels or mules. Infantry who moved on horseback, but dismounted to fight on foot were in the 17th and early 18th centuries known as dragoons, a class of mounted troops which later evolved into cavalry proper while retaining their historic title. From earliest times cavalry had the advantage of improved mobility, making it an
"instrument which multiplied the fighting value of even the smallest forces, allowing them to outflank and avoid, to surprise and overpower, to retreat and escape according to the requirements of the moment."[1]
A man fighting from horseback also had the advantages of greater height, speed, and inertial mass over an opponent on foot. Another element of horse mounted warfare often overlooked by modern day observers is the psychological impact a mounted soldier can inflict on an opponent.
The mobility and shock value of the cavalry was greatly appreciated and exploited in the Ancient and Middle Ages armed forces, and some consisted mostly of the cavalry troops, particularly in nomadic societies of Asia, notably the Mongol armies. In Europe cavalry became increasingly armoured cavalry and eventually became known for the mounted knights. During the 17th century cavalry in Europe lost most of its armour, and by the mid-19th century only some regiments retained the cuirass. In the period between the World Wars much of the cavalry troops were motorised and mechanised or reformed as tank troops, However some cavalry still served during the Second World War, notably in the Red Army. Most cavalry units that are horse-mounted in modern armies serve in purely ceremonial roles, or as mounted infantry in difficult terrain such as mountains or heavily forested areas.
In many modern armies, the term cavalry is still often used to refer to units that are a combat arm of the armed forces which in the past filled the traditional horse-borne land combat light cavalry roles. These include scouting, skirmishing with enemy reconnaissance elements to deny them knowledge of own disposition of troops, forward security, offensive reconnaissance by combat, defensive screening of friendly forces during retrograde movement, retreat, restoration of command and control, deception, battle handover and passage of lines, relief in place, linkup, breakout operations, and raiding. The shock role, traditionally filled by heavy cavalry, is generally filled by units with the "armored" designation.
Before the Iron Age, the role of cavalry on the battlefield was largely performed by light chariots. The chariot originated with the Sintashta-Petrovka culture in Central Asia and spread by nomadic or semi-nomadic Indo-Iranians.[2] The chariot was quickly adopted by settled peoples both as a military technology and an object of ceremonial status, especially by the Pharaohs of the New Kingdom of Egypt as well as Assyrian and Babylonian royalty.
The power of mobility given by mounted units was recognized early on, but was offset by the difficulty of raising large forces and by the inability of horses (then mostly small) to carry heavy armor. Cavalry techniques were an innovation of equestrian nomads of the Central Asian and Iranian steppe and pastoralist tribes such as the Persian Parthians and Sarmatians.
The photograph above right shows Assyrian cavalry from reliefs of 865–860 BC. At this time, the men had no spurs, saddles, saddle cloths, or stirrups. Fighting from the back of a horse was much more difficult than mere riding. The cavalry acted in pairs; the reins of the mounted archer were controlled by his neighbour’s hand. Even at this early time, cavalry used swords, shields, and bows. The sculpture implies two types of cavalry, but this might be a simplification by the artist. Later images of Assyrian cavalry show saddle cloths as primitive saddles, allowing each archer to control his own horse.
As early as 490 BC a breed of large horses was bred in the Nisaean plain in Media to carry men with increasing amounts of armour (Herodotus 7,40 & 9,20). But large horses were still very exceptional at this time. Excepting a few ineffective trials of scythed chariots, the use of chariots in battle was obsolete in civilized nations by the time of the Persian defeat at the hands of Alexander the Great, but chariots remained in use for ceremonial purposes such as carrying the victorious general in a Roman triumph, for chariot racing. The southern British met Julius Caesar with chariots in 55 and 54 BC, but a century later, in the Roman conquest of Britain chariots were obsolete even in Britannia.
Cavalry have played a relatively minor role in Ancient Greece, with conflicts decided by massed armored infantry. However, Thessaly was widely known for producing competent cavalrymen, and later experiences in wars both with and against the Persians taught the Greeks the value of cavalry in skirmishing and pursuit. The Athenian author and soldier Xenophon in particular advocated the creation of a small but well-trained cavalry force; to that end, he wrote several manuals on horsemanship and cavalry operations.
The Macedonian kingdom in the north, on the other hand, developed a strong cavalry force that culminated in the hetairoi (Companion cavalry) of Philip II and Alexander the Great. In addition to these heavy cavalry, the Macedonian combined arms army also employed lighter horsemen called prodromoi for scouting and screening, as well as the Macedonian pike phalanx and various kinds of light infantry. There were also the Ippiko (or "Horserider"), Greek "heavy" cavalry, armed with kontos (or cavalry lance), and sword. They wore leather armour or chainmail and hat. They were medium cavalry, rather than heavy cavalry. They were good scouts, skirmishers, and chasers.
The effectiveness of this combined-arms system was most dramatically demonstrated in Alexander's conquest of Persia, Bactria, and northwestern India.