A stirrup is a light frame or ring that holds the foot of a rider, attached to the saddle by a strap, often called a stirrup leather. Stirrups are usually paired and are used to aid in mounting and as a support while using a riding animal (usually a horse or other equine, such as a mule). They greatly increase the rider's ability to stay in the saddle and control the mount, increasing the animal's usefulness to humans in areas such as communication, transportation and warfare.
In antiquity, the earliest foot supports (appearing in India by the 2nd century BC) consisted of riders placing their feet under a girth or using a simple toe loop. Later, a single stirrup was used as a mounting aid, and paired stirrups appeared after the invention of the saddle tree. In China, the stirrup appeared within the first few centuries AD and may have spread westward through the nomadic peoples of Central Eurasia. Some scholars believe that the Sarmatians were the first to devise true stirrups during the first century BC. The use of paired stirrups is credited to the Chinese Jin Dynasty and came to Europe during the Middle Ages. Some argue that the stirrup was one of the basic tools used to create and spread modern civilization, possibly as important as the wheel or printing press.
The English word "stirrup" stems from Old English stirap, stigrap, Middle English stirop, styrope, i.e. a mounting or climbing-rope. Compare Old English st?gan "to ascend" and rap "rope, cord".
The stirrup, which gives greater stability to a rider, has been described as one of the most significant inventions in the history of warfare, prior to gunpowder. As a tool allowing expanded use of horses in warfare, the stirrup is often called the third revolutionary step in equipment, after the chariot and the saddle. The basic tactics of mounted warfare were significantly altered by the stirrup. A rider supported by stirrups was less likely to fall off while fighting, and could deliver a blow with a weapon that more fully employed the weight and momentum of horse and rider. Among other advantages, stirrups provided greater balance and support to the rider, which allowed the knight to use a sword more efficiently without falling, especially against infantry adversaries. Contrary to common modern belief, however, it has been asserted that stirrups actually did not enable the horseman to use a lance more effectively (cataphracts had used lances since antiquity), though the cantled saddle did.[unreliable source?]
The invention of the stirrup occurred relatively late in history, considering that horses were domesticated in approximately 4500 BC, and the earliest known saddle-like equipment were fringed cloths or pads with breast pads and cruppers used by Assyrian cavalry around 700 BC.
The earliest manifestation of the stirrup was a toe loop that held the big toe and was used in India late in the second century BC, though may have appeared as early as 500 BC. This ancient foot support consisted of a looped rope for the big toe which was at the bottom of a saddle made of fibre or leather. Such a configuration was suitable for the warm climate of south and central India where people used to ride horses barefoot. A pair of megalithic double bent iron bars with curvature at each end, excavated in Junapani in the central Indian state of Madhya Pradesh have been regarded as stirrups although they could as well be something else.Buddhist carvings in the temples of Sanchi, Mathura and the Bhaja caves dating back between the 1st and 2nd century BC figure horsemen riding with elaborate saddles with feet slipped under girths. In this regard archaeologist John Marshall described the Sanchi relief as "the earliest example by some five centuries of the use of stirrups in any part of the world". Some credit the nomadic Central Asian group known as the Sarmatians as developing the first stirrups.
The invention of the solid saddle tree allowed development of the true stirrup as it is known today. Without a solid tree, the rider's weight in the stirrups creates abnormal pressure points and make the horse's back sore. Modern thermography studies on "treeless" and flexible-tree saddle designs have found that there is considerable friction across the center line of a horse's back. A coin of Quintus Labienus, who was in service of Parthia, minted circa 39 BC depicts on its reverse a saddled horse with hanging objects. Smith suggests they are pendant cloths, while Thayer suggests that, considering the fact that the Parthians were famous for their mounted archery, the objects are stirrups, but adds that it is difficult to imagine why the Romans would never have adopted the technology.[original research?]
In Asia, early solid-treed saddles were made of felt that covered a wooden frame. These designs date to approximately 200 BC  One of the earliest solid-treed saddles in the west was first used by the Romans as early as the 1st century BC, but this design did not have stirrups either.
It is speculated that stirrups may have been used in China as early as the Han dynasty (206 BC- 220 AD). Stirrups were used in China at the very latest by the early 4th century AD. A funerary figurine depicting a stirrup dated 302 AD was unearthed from a Western Jin dynasty tomb near Changsha. The stirrup depicted is a mounting stirrup, only placed on one side of the horse, and too short for riding. The earliest reliable representation of a full-length, double-sided riding stirrup was also unearthed from a Jin tomb, this time near Nanjing, dating to the Eastern Jin period, 322 AD. The earliest extant double stirrups were discovered in the tomb of a Northern Yan noble, Feng Sufu, who died in 415 AD. Stirrups have also been found in Goguryeo tombs dating to the 4th and 5th centuries AD, but these do not contain any specific date. The stirrup appeared to be in widespread use across China by 477 AD.
The appearance of the stirrup in China coincided with the rise of heavily armoured cavalry in the region. Dated to 357 AD, the tomb of Dong Shou shows fully armoured riders as well as horses. References to "iron cavalry" and "iron horse" began to appear at the same time and instances of captured horse armour in numbers as high as 5,000 and 10,000 are recorded. In addition to the stirrups, Feng Sufu's tomb also contained iron plates for lamellar armour. Armoured heavy cavalry would dominate Chinese warfare from the 4th century AD to the early Tang dynasty when the military transitioned to light cavalry. A. von Le Coo's theory on the invention of the stirrup is that it was a contraption created by either mounted people who wanted to make riding less tiring, or those unused to riding to gain the necessary skills to match their adversaries.
The very earliest Chinese representation of a stirrup comes from a tomb figurine from South China dating to 302 AD, but this is a single stirrup that must have been used only for mounting the horse. The earliest figurine with two stirrups probably dates from about 322, and the first actual specimens of stirrups that can be dated precisely and with confidence are from a southern Manchurian burial of 415. However, stirrups have also been found in several other tombs in North China and Manchuria that are most likely of fourth century date. Most of these early Northeast Asian stirrups were oval in shape and made from iron, sometimes solid and sometimes applied over a wooden core, and this form would remain in use for many centuries thereafter.-- David Graff
Stirrups (abumi) were used in Japan as early as the 5th century. They were flat bottomed rings of metal-covered wood, similar to European stirrups. The earliest known examples were excavated from tombs. Cup-shaped stirrups (tsubo abumi) that enclosed the front half of the rider's foot eventually replaced the earlier design.
During the Nara period, the base of the stirrup which supported the rider's sole was elongated past the toe cup. This half-tongued style of stirrup (hanshita abumi) remained in use until the late Heian period when a new stirrup was developed. The fukuro abumi or musashi abumi had a base that extended the full length of the rider's foot and the right and left sides of the toe cup were removed. The open sides were designed to prevent the rider from catching a foot in the stirrup and being dragged.
The military version of this open-sided stirrup (shitanaga abumi) was in use by the middle Heian period. It was thinner, had a deeper toe pocket and an even longer and flatter foot shelf. This stirrup stayed in use until European style-stirrup rings were reintroduced in the late 19th century. It is not known why the Japanese developed this unique style of stirrup. These had a distinctive swanlike shape, curved up and backward at the front so as to bring the loop for the leather strap over the instep and achieve a correct balance. Most of the surviving specimens from this period are made entirely of iron, inlaid with designs of silver or other materials, and covered with lacquer. In some examples there is an iron rod from the loop to the footplate near the heel to prevent the foot from slipping out. The footplates are occasionally perforated to let out water when crossing rivers, and these types are called suiba abumi. There are stirrups with holes in the front forming sockets for a lance or banner.
By the late 6th or early 7th century AD, primarily due to invaders from Central Asia, such as the Avars, stirrups began spreading across Asia to Europe from China. In terms of archaeological finds, the iron pear-shaped form of stirrups, the ancestor of medieval European types, has been found in Europe in 7th century Avar graves in Hungary. A total of 111 specimens of early Avar-age, apple shaped, cast-iron stirrups with elongated suspension loop and flat, slightly inward bent tread had been excavated from 55 burial sites in Hungary and surrounding regions by 2005. The first European literary reference to the stirrup may be in the Strategikon, traditionally ascribed to the Roman Emperor Maurice, and therefore written sometime between 575 and 628, but this is widely disputed, and the work is placed in the eighth or ninth century by others. Maurice's manual notes the appropriate equipping of Imperial cavalry: "the saddles should have large and thick clothes; the bridles should be of good quality; attached to the saddles should be two iron steps [skala], a lasso with a thong...."  Dennis notes that the lack of specific Greek word for stirrup evidences their novelty to the Byzantines, who are supposed to have adopted these from their bitter enemy the Avars, and subsequently passed them on to their future enemies, the Arabs. An early 7th-century date is secured for most Hungarian finds of stirrups with elongated suspension loops, though some of these must even be dated to before 600. Literary and archaeological evidence taken together may indicate that the stirrup was in common military use in South-Central Europe and the Eastern Mediterranean by the latter half of the 6th century, with the Roman Empire having them in use by the year 600.
By the 8th century stirrups began to be adopted more widely by Europeans. The earliest stirrups of western Europe, those of Budenheim and Regensburg, were either brought from the Avar Khaganate as booty or gifts, or were local imitations of stirrups in use at that time among Avar warriors. However, the Avar-style stirrups were not as widely adopted in western Europe. Stirrups do not appear in the Merovingian and Italo-Lombard milieu in large numbers, nor as frequently as within the Carpathian Basin. Most other stirrups found in Germany that date to the 7th century do not resemble the iron Avar style commonly found in burial assemblages from Hungary and neighboring regions. Instead, hanging mounts occasionally found in burial assemblages in southern Germany suggest the use of wooden stirrups. The scarcity of early-medieval stirrup finds in western Europe was noted by Bernard Bachrach: "Out of 704 eighth century male burials excavated in Germany until [sic] 1967, only 13 had stirrups." The earliest stirrups in the Baltic region are replicas of those in existence in Germany during the 7th century. In northern Europe and Britain the metamorphosis of earlier wood, rope and leather forms of stirrups to metal forms can be seen in the archeological record, "suggesting that one or more of the early forms have parallel development with those in Hungary, rather than being derived solely from the latter region." "In Scandinavia two major types of stirrups are discerned, and from these, by the development and fusion of different elements, some almost certainly of central European origin, most other types were evolved." The first main type, Scandinavian type I, appears to owe little to Hungarian forms. The earliest variety of this type can be dated to the 8th century in Vendel grave III in Sweden. The second principal type in North Europe has, as its most characteristic feature, a pronounced rectangular suspension loop set in the same plane as the bow, as found amongst the Hungarian examples, and is predominantly centered in Denmark and England during the later 10th and 11th centuries. A variant of this type, called the North European stirrup, has been dated to the second half of the 10th century in Sweden, found at the boat-burial cemetery at Valsgärde.
In Denmark from the 920s to the 980s, during the reign of the Jelling kings, many leading Danes were buried with military honors and equipped with stirrups, bits and spurs, in what are called cavalry-graves, found mostly in north Jutland. Into England, it is argued, stirrups were not introduced by the Scandinavian settlers of the 9th century but are more likely related to later Viking raids led by Cnut the Great and others during the reign of king Aethelred (978-1013).
In what today is France, Charles Martel distributed seized lands to his retainers on condition that they serve him by fighting in the new manner, which some attribute to his recognizing the military potentialities of the stirrup. Later, Charlemagne ordered his poorer vassals to pool their resources and provide a mounted and armed knight, though the system proved unworkable, and instead the system of distributing land to vassals based on a knight's service was developed.
Accounts of the Empire of Mali mention the use of stirrups and saddles in the cavalry . Stirrups resulted in the creation and innovation of new tactics, such as mass charges with thrusting spear and swords.
The introduction of the stirrup not only made the mounted warrior supreme in medieval warfare, but may have initiated complex and far-reaching social and cultural changes in Europe. Some scholars credit the birth of feudalism and its subsequent spread into Northern Italy, Spain, Germany and into the Slavic territories to this use of the stirrup. It is argued that the rising feudal class structure of the European Middle Ages derived ultimately from the use of stirrups: "Few inventions have been so simple as the stirrup, but few have had so catalytic an influence on history. The requirements of the new mode of warfare which it made possible found expression in a new form of western European society dominated by an aristocracy of warriors endowed with land so that they might fight in a new and highly specialized way."
Other scholars dispute this assertion, suggesting that stirrups may provide little advantage in shock warfare, but are useful primarily in allowing a rider to lean farther to the left and right on the saddle while fighting, and simply reduce the risk of falling off. Therefore, it is argued, they are not the reason for the switch from infantry to cavalry in medieval armies, nor the reason for the emergence of Feudalism.
For the comfort of the horse, all stirrups require that the saddle itself be properly designed. The solid tree of the saddle distributes the weight of the rider over a greater surface area of the horse's back, reducing pressure on any one area. If a saddle is made without a solid tree, without careful engineering, the rider's weight in the stirrups and leathers can create pressure points on the horse's back and lead to soreness. This is especially noticeable with inexpensive bareback pads that add stirrups by means of a strap across the horse's back with a stirrup at each end.
Stirrups used on English saddles are usually made of metal. Though called "irons," they are no longer made of iron, as a rule, but instead stainless steel is the metal of choice, due to its strength, though when weight is an issue, such as for a jockey, they may also be made of aluminum. Inexpensive stirrups may be made of nickel, which can easily bend or break and should be avoided. Stirrups may also be made of synthetic materials and various metallic alloys. There are many variations on the standard stirrup design, most claiming either to be safer in the event of a fall or to make it easier for a rider to maintain a proper foot and leg position.
Some variations include:
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