Imperial Chinese Army

The recorded military history of China extends from about 2200 BC to the present day. Chinese pioneered the use of crossbows, advanced metallurgical standardization for arms and armor, early gunpowder weapons, and other advanced weapons, but also adopted nomadic cavalry and Western military technology.Frederic E. Wakeman: ''The Great Enterprise: The Manchu Reconstruction of Imperial Order in Seventeenth-century China'', Vol. 1 (1985), , p. 77 China's armies also benefited from an advanced logistics system as well as a rich strategic tradition, beginning with Sun Tzu's ''The Art of War'', that deeply influenced military thought.

History of military organization

The military history of China stretches from roughly 2200 BC to the present day. Chinese armies were advanced and powerful, especially after the Warring States period. These armies were tasked with the twofold goal of defending China and her subject peoples from foreign intruders, and with expanding China's territory and influence across AsiaLi and Zheng (2001), 212

Pre-Warring State

Early Chinese armies were relatively small affairs. Composed of peasant levies, usually serfs dependent upon the king or the feudal lord of their home state, these armies were relatively ill-equipped. While organized military forces had existed along with the state, few records remain of these early armies. These armies were centered around the chariot-riding nobility, who played a role akin to the European knight as they were the main fighting force of the army. Bronze weapons such as spears and swords were the main equipment of both the infantry and charioteers. These armies were ill-trained and haphazardly supplied, meaning that they could not campaign for more than a few months and often had to give up their gains due to lack of supplies. The ''shi'' knights had a strict code of chivalry. During the Shang and Western Zhou eras, warfare was seen as an aristocratic affair, complete with protocols that may be compared to the chivalry of the European knight.Sources of East Asian Tradition, Theodore De Bary(Columbia University Press 2008), p. 119 States would not attack other states while mourning its ruler. Ruling houses would not be completely exterminated so descendants would be left to honor their ancestors.Pre-modern East Asia: To 1800: A Cultural, Social, and Political History, ed. Patricia Ebrey, Anne Walthall, and James Palais (Boston and New York: Houghton Mifflin Company, 2006), p. 29 Examples of this code include the battle of Zheqiu, 420 BC, in which the ''shi'' Hua Bao shot at and missed another ''shi'' Gongzi Cheng, and just as he was about to shoot again, Gongzi Cheng said that it was unchivalrous to shoot twice without allowing him to return a shot. Hua Bao lowered his bow and was subsequently shot dead, or in 624 B.C. when a disgraced ''shi'' from the State of Jin led a suicidal charge of chariots to redeem his reputation, turning the tide of the battle. In the Battle of Bi, 597 BC, the routing chariot forces of Jin were bogged down in mud, but pursuing enemy troops stopped to help them get dislodged and allowed them to escape. During the Spring and Autumn period (771–479 BC), Duke Xiang of Song, when being advised to attack enemy Chu forces while the enemy army was fording a river, refused and waited for the Chu army to form formation. After Xiang lost the battle and was being rebuked by his ministers of war, he responded: "The gentleman does not inflict a second wound, nor does he capture those with gray hair. On campaigns, the ancients did not obstruct those in a narrow pass. Even though I am but the remnant of a destroyed state, I will not drum an attack when the other side has not yet drawn up its ranks." His minister retorted, "My lord does not know battle. If the mighty enemy is in a defile or with his ranks not drawn up, this is Heaven assisting us", signifying that by the Spring and Autumn period such attitudes on chivalric honor was dying out.

Under the Shang and Zhou, these armies were able to expand China's territory and influence from a narrow part of the Yellow River valley to all of the North China plain. Equipped with bronze weapons, bows, and armor, these armies won victories against the sedentary Dongyi to the East and South, which were the main direction of expansion, as well as defending the western border against the nomadic incursions of the Xirong. However, after the collapse of the Zhou Dynasty in 771 BC when the Xirong captured its capital Haojing, China collapsed into a plethora of small states, who warred frequently with each other. The competition between these states would eventually produce the professional armies that marked the Imperial Era of China.

Prehistory and Shang dynasty

Early Bronze age Chinese cities were characterised by massive defensive walls. The Erlitou culture's bronze workshops probably gave it a decisive edge over competing groups. Armies were probably relatively ineffective given the prevalence of extensive fortifications, although the Erlitou culture probably succeeded in breaching these occasionally since they were able to expand the area of their control. Starting from the 3rd Millennium BC and throughout the 2nd Millennium BC, there is a correlation between elite status and military status in tomb artefacts.

The ''shi'' rose to power through their control of the new technology of bronzeworking. From 1300 BC, the ''shi'' transitioned from foot knights to being primarily chariot archers, fighting with composite recurved bow, a double-edged sword known as the ''jian'', and armour.Peers, CJ, Soldiers of the Dragon, Osprey Publishing New York, pp. 17, 20, 24, 31

Military affairs carried a high priority in the Shang dynasty and the Shang elite was a warrior class led by clan-based chiefdoms. Martial values and robust physical activity were necessities of Shang culture. Like warrior classes elsewhere, land was granted by the king in reward for military success and was rescinded in the event of failure. Even the last Shang emperor Xin, who was supposedly decadent, still had a reputation for great physical fighting ability. Contrary to the pacifistic assumptions of later scholars writing about the Shang, the Shang clearly viewed the military as paramount and civilian functions as subordinate. The Shang kings took on the roles of Commander-in-chief, Defence minister, as well as field commander, while royal family members, members of other noble clans, and high officials were also delegated battlefield command. Like the ancient Greeks, the Shang relied on divination to make decisions regarding military action. ''Shi'', or army, was already a distinct unit, and this was also used as a prefixed title to designate generals. ''Lü'' or brigade was also a common combat unit, and so did ''hang'' or line. Battlefield armies were organised into left, right and center. Specialisation of military appointments was already evident under the Shang dynasty. ''Shi zhang'' or leader of the armies, may have been a functional title in the later period, where military organisation had become very formalised. There were clearly defined posts such as the ''ma'' (horse), ''ya'' (commander), ''fu'' (“quiver”), ''she'' (archer), ''wei'' (protector), ''ch’üan'' (dog), and ''shu'' (border protection), prefixed with ''tuo'' (many), indicating higher status and ''mou'' for “planning”. The discovery of multiple chariots in graves as well as tombs consisting entirely of horses and chariots demonstrate that the chariot was used in battle and not just prestige transport. The horse officers seemed to be particularly valued and played a prominent command role due to the importance of the horse in warfare. The Shang under Wu Ding were quick to establish suzerainty over defeated enemies such as the Que, Zhi and Yue states, drawing on their manpower to further their conquests without expending their own resources. Marriage alliances were used to secure the loyalty of the submitted states, and submitted vassals sometimes received high positions in the Shang government. Warriors of the Yi (barbarians) to the south were integrated into Shang units due to their archery skills.

Although the Shang depended upon the military skills of their nobility, Shang rulers could mobilize the masses of town-dwelling and rural commoners as conscript laborers and soldiers for both campaigns of defense and conquest. Aristocrats and other state rulers were obligated to furnish their local garrisons with all necessary equipment, armor, and armaments. The Shang king maintained a force of about a thousand troops at his capital and would personally lead this force into battle.

From the reign of Wu Ding on, the numbers of permanent standing warriors increased and the conscription of ''zhongren'' (commoners) which originally played a support role, became much more common and important role in the military as army sizes expanded. However, the warrior clans were still the core of the army. A highly efficient military reporting system spanning hundreds of miles was organised with a network of boats, chariots, runners and horse riders supported by widely scattered state guesthouses and hostels. There was a system of drums and possibly also signal fires to signal enemy attacks. Military planning was already developed, with assessment of enemy strength, strategic options, routes of advance and transport and logistical necessities. Military campaigns were ordered to obtain the submission of neighbouring states, and others were meant to exterminate enemy states. Rudimentary tactics of taking advantageous positions, concentrating forces at key points and achieving surprise through for instance, ambush or reconnaissance, were in use. Archery was highly esteemed and officials were already assigned to train soldiers in archery. Based on archaeological evidence the reflex bows of the period had the strength to pierce bone. The main hand-to-hand weapons were dagger-axes and battleaxes.

Aristocrats and commoners both fought with axe, spear, bow and dagger-axe, except that aristocrats had better quality weapons and more complete armour. Warfare transformed during the Shang period. Aristocrats went from fighting on foot to fighting from chariots, and archery developed due to the introduction of the composite bow. The high levels of requisite training made warfare more socially stratified and gendered.

The massive fortifications of cities disappeared in the late Shang period, coinciding with the rise of the chariot.

Western Zhou and Spring and Autumn period

While chariots had been used in battle previously, only in the Western Zhou era were they used in large numbers. The Zhou conquest of the Shang may have been linked to their use of the chariot. Under the Shang, chariots were extremely ornate, used by high ranking elite as command and archery platforms, but under the Zhou chariots were simpler and more common. The ratio of chariots to foot soldiers under the Shang is estimated to be 1 to 30, while under the Zhou it is estimated to be 1 to 10. However this was still limited as compared to the 1 to 5 in Ancient Egypt.

The royal army of the Western Zhou consisted of two divisions, the Six Armies of the West (西六師), based in the Zhou capital in the Wei River valley, and the Eight armies of Chengzhou (成周八師) based in the eastern capital Chengzhou.

The presence of the Eight Armies stationed in the East was intended to keep the regional states in line. Unlike the Shang, the Zhou were determined to assert their governance over subjugated peoples. These regional states were originally assigned to royal family members to monitor the conquered Shang people, but gradually drifted away from royal authority. The military assistance that the regional states provided to the Zhou was dependent on the cooperativeness of local rulers and the ability of the King.

Military command was divided according to aristocratic rank, and power was shared among the feudal lords. Vassal states were entitled to smaller military forces parallel to the royal court, with large states entitled to 3 armies, medium states having 2, and small states with 1. Top ministers too had their personal armies, limited to 100 riders, and they were similarly expected to partake in military campaigns and fiefs, such as the ministerial role ''taishi''. However, apart from the top rung of leadership, the lower official posts were beginning to be separated along civil-military lines. The position of ''huchen'' was in command of the infantry defences of the royal court, ''shishi'' were the local town garrison commanders, while ''sima'' was the generic title used by officials at every level of the army, in charge of conscription and taxes. Soldiers were drafted from the urban dwellers, which consisted of the clans of the Zhou ruling class, and were required to serve one out of every four seasons in a year. Nobles would form the war chariot core of the Zhou army.

The fourth King, Zhao of Zhou (975-957 BC) suffered a severe defeat at the battle against the State of Chu on the Han River, where the entire Six Armies of the West were lost and had to be rebuilt. This led to the end of Zhou dominance as opponents began emboldened and challenged its strength frequently.

In the Spring and Autumn period, archery switched from targeted shooting to massed volleys. By the end of the Spring and Autumn Period cavalry had appeared on the battlefield, and the chariot would gradually revert to being a command platform in the course of the ensuing Warring States period.

Warring States

By the time of the Warring States, reforms began that abolished feudalism and created powerful, centralized states. The power of the aristocracy was curbed and for the first time, professional generals were appointed on merit, rather than birth. Technological advances such as iron weapons and crossbows put the chariot-riding nobility out of business and favored large, professional standing armies, who were well-supplied and could fight a sustained campaign. The size of armies increased; whereas before 500 BC Chinese field armies numbered in the tens of thousands, by 300 BC armies regularly included up to a couple of hundred thousand drafted soldiers, accompanied by cavalry. For example, during the Battle of Changping the state of Qin drafted all males over 15 years of age. Although these conscripts with one to two years of training would be no match individually against aristocratic warriors with years of experience, they made up for it with superior standardization, discipline, organization, and size. Although most soldiers were conscripts, it was also common to select soldiers based on specific qualifications. The Confucian adviser Xun Zi claimed that foot soldiers from the Wei state were required to wear armor and helmets, shoulder a crossbow with fifty arrows, strap a spear and sword, carry three days' supply of rations, and all the while march 50 kilometers in a day. When a man meets this requirement, his household would be exempted from all corvée labor obligations. He would also be given special tax benefits on land and housing. However, this policy made soldiers in the Wei state difficult to replace.

In addition, cavalry was introduced. The first recorded use of cavalry took place in the Battle of Maling, in which general Pang Juan of Wei led his division of 5,000 cavalry into a trap by Qi forces. In 307 BC, King Wuling of Zhao ordered the adoption of nomadic clothing in order to train his own division of cavalry archers.

In the field of military planning, the niceties of chivalrous warfare were abandoned in favor of a general who would ideally be a master of maneuver, illusion, and deception. He had to be ruthless in searching for the advantage, and an organizer in integrating units under him.

Qin–Han

In 221 BC, the Qin unified China and ushered in the Imperial Era of Chinese history. Although it only lasted 15 years, Qin established institutions that would last for millennia. Qin Shi Huan, titling himself as the "First Emperor", standardized writing systems, weights, coinage, and even the axle lengths of carts. To reduce the chance of rebellion, he made the private possession of weapons illegal. In order to increase the rapid deployment of troops, thousands of miles of roads were built, along with canals that allowed boats to travel long distances. For the rest of Chinese history, a centralized empire was the norm.

During the Qin dynasty and its successor, the Han, the Chinese armies were faced with a new military threat, that of nomadic confederations such as the Xiongnu in the North. These nomads were fast horse archers who had a significant mobility advantage over the settled nations to the South. In order to counter this threat, the Chinese built the Great Wall as a barrier to these nomadic incursions, and also used diplomacy and bribes to preserve peace. Although the Qin general Meng Tian ousted the Xiong-nu from the Ordos region, they regained power under the rule of Maodun. Maodun conquered the Eastern Hu and drove the Yuezhi tribes west. He reclaimed the Ordos from the now crumbling Qin empire and defeated the first Han emperor Gao in battle. This led to a policy of appeasement until the reign of Wudi of Han, who decided to take a tougher stance. However, protecting the borders required a significant investment. Manning the stations of the Great Wall took about ten thousand men. To support them, fifty to sixty thousand soldier-farmers were moved to the frontiers in order to reduce the cost of transporting supplies. These drafted farmers were not good cavalry troops, so a professional army emerged on the frontiers. These consisted of northern Han mercenaries, convicts working for their freedom, and subjected "Southern" Xiong-nu living within Han territory. By 31 BC, the Han dynasty abolished universal military conscription that was passed down from the Warring States. In the South, China's territory was roughly doubled as the Chinese conquered much of what is now Southern China, and extended the frontier from the Yangtze to Vietnam.

Armies during the Qin and Han dynasties largely inherited their institutions from the earlier Warring States Period, with the major exception that cavalry forces were becoming more and more important, due to the threat of the Xiongnu. Under Emperor Wu of Han, the Chinese launched a series of massive cavalry expeditions against the Xiongnu, defeating them and conquering much of what is now Northern China, Western China, Mongolia, Central Asia, and Korea. After these victories, Chinese armies were tasked with the goal of holding the new territories against incursions and revolts by peoples such as the Qiang, Xianbei and Xiongnu who had come under Chinese rule.

The structure of the army also changed in this period. While the Qin had utilized a conscript army, by Eastern Han, the army was made up largely of volunteers and conscription could be avoided by paying a fee. Those who presented the government with supplies, horses, or slaves were also exempted from conscription.

Three Kingdoms–Jin

The end of the Han Dynasty saw a massive agrarian uprising that had to be quelled by local governors, who seized the opportunity to form their own armies. The central army disintegrated and was replaced by a series of local warlords, who fought for power until most of the North was unified by Cao Cao, who laid the foundation for the Wei Dynasty, which ruled most of China. However, much of Southern China was ruled by two rival Kingdoms, Shu Han