Dawn of Far Eastern Cataphracts- Chaotic 16 Kingdoms Period and Northern & Southern Dynasties: 欧亚重骑甲胄: 混乱十六国与南北朝甲胄

Music: Scourge of God

Armored collars, armored leg faulds. Warriors fully cocooned in lamellar

astride charging steeds in a tide of iron. Across Eurasia, the iron tide of 

cataphracts rode through many worlds

Reenactor (Above): William C 飞廉超

Art (Below) by 松石郎

This is both a topic that fascinates me greatly on a personal level but also warrants great caution in conservative qualification, mainly because the type of armor is a significant trend of development that spans across Eurasia, and arcs from the Korean Peninsula in the east across the spine of the Eurasian Steppes and verges as far as the Carpathian Mountains and the boot of Italy. Eastern in origin (relative to western Eurasia) the wide distribution of such designs was intimately linked with the rise of great steppe empires of the migration period and the immense powers of the stirrup-ed cataphracts.

Before we began it's important to lay down some ground rules. Because of such a wide distribution of ubiquitous design which were donned by such extremely varied peoples across the Eurasian belt, many modern nations and people groups had ancestors or spiritual ancestors who indeed had these type of armors. A great difficulty lies in delineating hard divisions and giving credits to such states, especially if some of these states lay in boundary regions (such as the Liaodong Penninsula between steppe-led Chinese dynasties and Korean states, or driven by expansionary steppe- empires with fluid territories that does not have the conceptualization of fixed inviolable borders as modern nation states does. 

Jin Dynasty (266–420) Caraphract. The crucible of high intensity warfare of the preceding 3 Kingdoms period had spurred on heavy armors that covered the rider's legs and full barding (horse armors) for the war horses. The invention of the stirrup also enabled the deployment of true cataphracts in great numbers. Northern tribes such as the Xianbei were masters of cataphract warfare and later united the fragmented northern China under the Xianbei- led Northern Wei dynasty.

Naturally in the post- Westphalian national order- with national pride and often overlapping claims , feelings are often bruised and discourse devolve into baggage laden recriminations. As a rule, rather than specifying 1 progenitor or inventing state that is owed prominent credit, it shall be conservatively deigned as Eurasian- namely for its distribution belt. For most of the images presented inspiration for it will be listed and if there are competing claims or regional examples that it is also drawn from, it will also be listed. And nearly all of the examples given focus in this article- given the nature of this blog, will deal with those in a Chinese context- or a state that is in its immediate periphery.

PRECESSESORS- HAN & SODGIAN EARLY ANTECEDENTS

Ancient Heavies: (Above) Qin heavy raw hide lamellar armor from late Warring States period.

Heavy silhouettes have long existed since late Spring and Autumn period and the entrance

into the Warring States period. By the 3rd century BC- interstate fighting had became

a matter of mortal survival, elite formations are frequently mass equipped with armors-

including the famous (and more accurately infamous) Qin Vanguards

Above: Western Han cavalryman in medium armor- scaled pelvic faulds and pauldron sleeves are sewn into the lamellar cuirass itself- allowing the armored suit to be worn as if an article of clothing. Extended raised armored collars are often grafted into its construction as well to protect the neck and cheek from glancing blows. More dedicated examples of heavy Han armor- even in its early periods can be seen here.

Orlat Plaques- Central Asian examples from Orlat (modern Uzbekistan) of the historical Sogdian region. 1st-3rd century AD. The battle scene- rendered armored cataphract warriors in intense battles with each other, the identity of the warriors are still debated, and their identity had been variously interpreted to be Sodgians or Sakas, others have suggested Yuezhi (Kushans) and to some, Xiongnus. An ubiquitous feature of the detailed warriors is their prominent flared armored collars constructed from interlinked strips of lamellar.

Below: Model of a Saka cataphract armour with neck-guard, from Khalchayan. 1st century BCE. 

Museum of Arts of Uzbekistan

A Kangju (Sogdic) warrior- interpretation of the Orlat Plaque

Heavy cavalry with extensively protected rider with prominent collars, arm guards, and leg cover armor. He is equipped with a lance, bow, and sword. The horses themselves remain largely unbarded.

Raised native Chinese neck guard designs from earlier Warring States- and Qin periods can be found here that suggest earlier cross exchange of designs and silhouettes, including the Pontic Scythian helm and regional distribution armors with high collars. 

AGE OF THE HUNS

Hephthalite Warrior by Joan Francesc Oliveras Pallerols

Such designs remained well after the Eastern Han decisively crushed and expelled the Northern Xiongnus- while keeping the Southern Xiongnu as their own vassals. Though weakened, the Xiongnus- which at their height controlled vast swathes of the eastern Eurasian steppes, did exert great powers both in the east and west. Historians still contend the exact origin of the Huns and their connection to the Xiongnu (insight: archaic rendering of the Chinese for Xiongnu is pronounced "Hunnu" similar to Ḥūna) - but the various powerful subgroups continued to exert tremendous forays of conquest across Transoxiana and northern India. Significant climate pressures- including the extreme multi-decade of megadrought spells resulted in total regional collapse of agriculture across western Eurasia, spurred on by the Hunnic expansions, immemorable displaced peoples did- topple like dominos in an avalanche as far as the recovering Roman empire. The eastern part played by the descendant of the (Southern and assimilated) Xiongnus was no less significant.

AUXILLARIES OF THE HAN & JIN- BARBARIANS *IN* THE GATE

Above: Northern Chinese Cavalryman- 16 Kingdom- Northern Dynasty period (North and South Dynasties) with prominent neck collar guards.

Before we proceed it is vital to address and correct a common misconception of this period. When the Jin unified a fragmented China after the chaos of the 3 Kingdoms period- only to see the northern half of it lost to a large constellation of none- Han, steppe- led dynasties- called the "Sixteen Kingdoms" there has always been a knee- jerk mental image by those not familiar with the period as if an overbearing quantity of foreign hordes joined in conspiracy and breached into the Han Great Walls in a Barbarian at the Gates scenario. However this is not the reality. Just like the Roman Empire which was able to survive even such sudden conspiracies because of core structural strength, command, and logistics, the imperial systems of Han and Jin were also able to survive this prospect. The Jin by the 3rd century AD was well familiar with these peoples, for centuries by that point.

Auxiliaries and crack cavalry- when the Eastern Han under Ban Chao exploited the 2 sided permanent split of the Xiongnu and expelled the Northern Xiongnu, the northern front became pacified for centuries, having asserted its primacy and toppled the stronger of the 2 Xiongnu groups, the remaining people groups of the north became Han vassals for centuries after. 

In peace, their context to the Han changed as well, Han settled some near and around the Great Wall itself as a soft line of frontier pickets, and the Chinese made extensive use of their tribesmen as auxiliaries that served the Eastern Han, Cao Wei, and Jin armies. Because dedicated horse archery requires a life time of training to hone and perfect, the Han maintained enough of their martial distinctions- Inner Asian groups did not have to pay tax to the Han and Jin government; and they usually provided the military service in the form of auxiliaries. More extensive coverage of these relations are provided in this article in granular and geometric detail.

The "Five Hu"- "Hu" is an archaic way to frame none- Han, often western peoples before they made for their bid in staking their own conquest dynasties in a war torn northern Jin China. If correlations is to be made, it is more aft to compare to the fall of northern China to the Hu- less to some sudden crisis between pressured groups of strangers, such as Adrianople, than various ambitious barbarian warlords that tried to seize their own Roman rump state for themselves at the twilight of the Western Roman Empire.

Music: Eight Princes

Horsemen's armor became significantly heavier in the Three Kingdoms period and the 3 centuries of disunity that followed. This included the 3 Kingdoms period, Jin, 16 Kingdoms, and the Northern and Southern dynasties period. Iron faulds also began to appear in large quantities. 

Armor by: Harentang 函人堂 Studio: Jin Dynasty heavy armor. 

Before Jin's northern cataclysm, it was the East Asian standard

From the Eastern Han to the onset of the calamitous War of the Eight Princes- Eastern Han, and subsequent dynasties like Cao Cao's Wei- during the 3 Kingdoms period made extensive use of nomadic cavalry auxiliaries. However one key policy that was maintained by these thrones is the imperative that powerful tribes are never deployed together in a centralized grouping, but split to serve at various diverse fronts to prevent the possibility of a major unstoppable mutiny. This was largely the same rubric for Han regional troops as well and Han commanders, who were often made to serve in far off fronts to prevent local power mongering. 

Post- Jin personal fortification.

Various 16 Kingdom era wide neck guard and their fastenings

However, this delicate balance of arrangement was grievously upset when the Jin dynasty- which united the realm after the chaos of the 3 Kingdoms period, made the disastrous decision to empower its own princes with regional powers effectively as local lordly governors. 

When court intrigue and power struggle among them erupted into all out violence in the War of the Eight Princes- whole regional blocks erupted into total war against each other in northern China. During the final stages of this battle royale, the remaining Jin princes became desperate for advantages that may fatally crush their imperial rivals- and gave permission from some of their auxiliary subcommanders- to gather their entire tribes together as vassal clients. 

Music: Invocation of Souls

Before the embers of the War of the Eight Princes even dimmed, a new conflagration erupted, as the major Hu tribes of the 5 great Hu all began to make grab for their own conquest dynasties across northern China, and leaving the weakened Jin to withdraw to the south- ushering into 3 long centuries of Northern and Southern divide. 

The Jin was not idle during this early era, due to its own internal problems it largely stockpiled power while the various Hu warlords mortally warred with each other- that is until major crisis occurred 43 years later and Jin did dispatch ambitious northern expeditions to reclaim the north under the capable general Huan Wen. Huan Wen's effort made great strides and defeated many obstacles in their northern trek and was welcomed by the old realm's subjects in the north, however unexpectedly the north reunited under the powerful sway of the Di people, who founded a mighty kingdom called Qin (Former Qin) that prevented his success. 

After being checked by the Former Qin, Huan Wen returned to Jin and though personally unable to realize his great dreams, the Huan family became one of the key old guard clans in the south and a fixture of its political order with its own house troops and armies.

NORTHERN LAMELLAR HELMS & PANOPLY- 

LIAODONG & LARGER KOREAN PENINSULA

1/6 Scale Former Qin Heavenly King Fu Jian action figure from 

Zhongyuan Battlefield series (model JZMW-015)

The chaos of inter- state warfare became more destructive than any seen in previous centuries across northern China. Although most of the tribes that had made for their grand bid for power at this time had well been insiders- who had assimilated to Han culture by this time (example, Xiongnus of this time, descended from vassalized and assimilated Southern Xiongnu tribes and were settled on the northern bend of the Yellow River founded a dynasty called "Xia" because Han origin stated that the mythical 1st dynasty's descendants last king was expelled north, and there they stated mingled with the women of the steppes and birthed the proto- progenitors of the Xiongnu,) these warlord- state's ruthless competition often resulted in very violent reprisals against each other, at times leading to the wholesome genocide of royal houses and entire people groups. In this crucible of violence and chaos, then rose an ambitious power that proved itself the deadliest among them all, the Di- lead state of Former Qin.

Above: 16 Kingdoms era lamellar helmet with prominent domed cap

Below: 16 Kingdoms era integrated neck armor with pauldron and additional throat guard.

Construction of heavy armor can be glimpsed from tomb figures of this time. A prominent new addition that gained prevalence in this period is the auxiliary throat guard that protected the neck and may be added over existing armored collars.

Reimagined armored figure of the warlord Cao Cao in armor that is more era authentic to the Jin and northern dynasties. The exact specific origin of these throat guards are not clear and may have been deployed as early as the final days of the Han dynasty. His lamellar helm- (a design type that would be seen ubiquitously for centuries across Eurasia by the likes of Huns, Avars, Lombards) is, however, quite era authentic, contemporary Eastern Wu (example in section below) demonstrated that such high domed lamellar helms with prominent finish of cap and plumes, already were fielded in China by the 3rd century.

Another rendition of Cao Cao's once illustrious ally and later nemesis Yuan Shao.

His lamellar helm is prominently tipped with a bright horse hair plume

Long draping leg armor- faulds are widely seen in figures from this period. With the invention of the stirrups, the new stability afforded by the seating and footlocks made cavalry charges far safer for the rider and inversely far deadlier to the enemy on the receiving end. Where as in previous centuries only certain well trained and provisioned empires were able to field them with (risky) success- such as those of the Parthians and corresponding Central Asian states, and even the Han in limited extent, stirrups enabled powerful states already highly formidable with mounted warfare to become exponentially deadlier in devastating massed heavy cavalry charges. 

THE NEAR- SUCCESS OF THE FORMER QIN

Panoply of a northern cataphract- Former Qin, (16 Kingdoms Period) -the heavy armor features a prominent throat guard over armored collar, and tall lamellar helmet. Long draping leg guards covers far and ends near the foot. Similarly his ride (seen below) is also encased in heavy barding. The "barbarian" led Northern conquest dynasties- having taken most of the plains and pastures of north and central China, boasted the best cavalry of the realm.

Former Qin- (it called itself "Qin" because the Di- people, after escaping from the chaos of major wars of the Central Plains, migrated to the nestled Guanzhong (lit. "Within the Pass") region in central Shaanxi province- ie the "Qin" 秦 region. To distinguish it from the 1st Emperor's Qin, and later new Qin states, this regime was called the "Former Qin") 

Long Ring- Pommel Sword: Chinese metallurgy leap-frogged as early as Western Han and with the introduction of blast furnace and production of high quality steel Chinese of this era (Jin example shown) were able to forge long swords of exceptional reach.

 In centuries past it was the heartland of the Zhou, Qin, and Western Han dynasties, and where the capital of Chang'An was located, Guanzhong region was both well protected and fielded an ancient aristocracy of warriors who remained prominent players all the way to the days of the kingdom of Qin, having taken this historical region the Di people- rather remarkably well adopted to local customs and intuitions and within only 1-2 generations, under the guidance of very talented native Han ministers, Former Qin became a well organized and dynamic conquering power.

 

After ably hobbling several nearby northern dynasties, and repelling a daring Jin northern march under the able revanchist general Huan Wen, Former Qin set its sights to rise above a regional power into the sole power of the north. Fittingly, like the Qin kingdom of old- the Former Qin also embarked on its own unification war under the most dynamic and ambitious of its young rulers, Fu Jian. 

Former Qin cataphract. 16 Kingdoms period.

Music: Glimpse of Fate

Fu Jian 苻堅 was a man of many talents, limitless ambition, and potential to become an interesting emperor of a unified China. Until the Han- led Sui dynasty centuries later, Fu Jian presided the critical period that came closest to breaking the back of the south and uniting all of China under (a foreign-led) dynasty. Proactive, athletic, and an eager learner, Fu Jian was known to be a capable warrior in his own right and a respectful and avid student to his teachers. He was also noted for having a just-minded streak as well, beside being a dynamic soldier at a young age. A noteworthy distinction for his title is that although multiple powerful players in northern China styled themselves as "Emperors" in the old Chinese fashion. Fu Jian instead chose to be styled as the "Heavenly King" 天王 instead. 

During his reign Former Qin aggressively and ably expanded in all directions, crushing all of its rivals in 3 cardinal directions, all of the west was taken, the north crushed and subjugated, and the east was taken as well until all of the north was united under the Former Qin in unison. For the first time since the chaos of the War of the Eight Princes, all of what was northern China only had 1 sovereign. And it was then that Fu Jian set his ambitious eye south, to the remnant of the Jin dynasty that still lingered in the south beyond the rivers after decades of seething at the northern barbarians. In 383 AD, t o take all of it in one shattering strike, Fu Jian reportedly amassed nearly a million soldiers (700,000- 800,000) across the north by reportedly implementing an immense conscription 人十丁遣一兵 by drafting out of every ten able-bodied adult males across the north.

Music: Heaven Overturned

Unfortunately for Fu Jian- the Jin dissected the true nature of his quantitative host. An captured Jin official named Zhu Xu- ostensibly having surrendered and pledged service to Former Qin was dispatched to exact a surrender from the Jin remnant. Instead of being loyal to the masters of the north he actually harbored lingering loyalty to his origin state. Instead- Zhu revealed to the Jin court of Former Qin's true strength. That despite is massive number, in reality it was consisted of he heterogeneous mix of forced conscripts from various recently conquered ethnic groups (including Han, Xianbei, and Qiang) with uncoordinated signal systems with his veterans. Instead of quantity, the Jin bet solely on quality. Dispatching only a small crack force across the river, it aggressively skirmished with the coming Former Qin columns and caused surprised delays that both gave caution to the invaders and also gave the Jin ample assessment of the enemy's capacity. Then the Jin dispatched its most elite forces- the 70,000- 80,000 Beifu Army 北府兵 "Northern Command" Army composed of fully professional troops from northern refugee families. Disciplined and highly motivated the 2 armies met by the bank of the Fei River.

When the two armies met, the Jin commander dispatched a strange proposal to the massive northern host on the opposite bank, whose battle line stretched so long it lied across a wide horizon. According to the Book of Jin, the Jin commander requested that the Qin army step back slightly to allow the Jin forces to cross the river and engage in a proper open-field battle. Amused- and fully intending to reneg and fall upon the Jin army after only half of them cross the river, the Qin army agreed to the proposal and began to pull back while the Jin crossed. However this- was exactly what the Jin counted on. Owing to the massive size of the Qin host, which consisted both of fresh- disgrungled levies and people of varied ethnicities, confusion soon swept across their ranks. Then right during this moment, the Jin double agent Zhu Xi and many other ministers with secret Jin loyalties, raced about and began to shout "The Qin army has been defeated!" Because the battle lines were so long, panic soon began to set in and the various companies began to panic. Then the Jin Beifu charged in a full merciless assault. Tens of thousands of Qin soldiers were cut down, and other units, already believing a defeat was already ongoing, began to break and route. Jin swiftly followed suit and the Qin army was shattered. 

Above: Fu Jian in Hu- Central Asian styled patterned robe. 

The lopsided slaughter at the Fei River turned what was the brink of Former Qin triumph and unification of China into a mortal cataclysm for the north. Many of the former subjugated northern tribes, which had surrendered to Former Qin as its vassals, swiftly rebelled and mutinied, Chang'An was swiftly taken, and Fu Jian, now eager to raise fresh troops from his own Di- tribesmen in Gansu, was ambushed along his ride and and executed. His race, the Di did not outlive long after him. The north was swiftly divided back into a patchwork of "barbarian" led states reverting to a landscape similar to his conquests and the Di were variously set upon by them all, the survivors would culturally be assimilated into the other tribes within generations after the catastrophe at the Fei River. Such battle demonstrate both that the south still had ability and resilience to save itself, but also how capriciously dangerous just one defeat like this is to a whole people who- from the brink of supremacy and mandate of Heaven for a new China- ceased to exist right afterwards.

 Reconstructed mounted cavalryman's armor, iron lamellar collar armor based from Gaya Korean examples. During this era, the Korean peninsula was similarly divided between various competing polities, the states of Goguryeo, Baekje, and Silla contended with each other, and in the southern coasts there even existed a confederacy called the Gaya that was closely traded and linked with Japan. Japanese historians had in the 19th century asserted that the mythical Empress Jingu had conquered these stretches in a retroactive attempt to justify their annexation of Korea, but although material culture exchanges and connections with Japan did exist, the nature of various relations are still subjected to modern debate. 

Similar matters extended to the northern part of the peninsula as well, as Goguryeo, and the then capable 16 Kingdoms Xianbei- led state of Former Yan (one of the key betrayers of Fu Jian and former masters of the Liaodong Peninsula and Hebei) was heavily overlapped. Former Yan and Goguryeo did have a very fractious relationship with each other, characterized by Goguryeo submission in vassalage to Yan when it was strong, and Goguryeo dominance when Yan was weak. When Yan power was snuffed out Goguryeo actually achieved prominence under 2 of its most powerful and very long- lived kings.

Above (Helmet): Chinese 3 Kingdoms era lamellar helmet example from the kingdom of Easter Wu. Mid: Han dynasty lamellar helm. In matters of design these armors to the general Eurasian trend, with lamellar and domed helmets comparable to late Han/ Eastern Wu examples from Chinese interior and iron collar lamellar guard designs.

"Mural of the warriors": Kizil Caves, Xinjiang, China- dated to around 5th century with warriors with lamellar helmets and neck guards.

 

The relationship and material culture between what was considered Former Yan and Goguryeo is well subjected to debate and contention. In previous centuries northern parts of the Korean Peninsula was the end point of the eastern lap of the Han dynasty and even after Cao Cao's Wei kingdom, the region was a commandery that lasted into the early 4th century. Significant tombs with murals of this period, such as that of Anak Tomb No. 3 is also subjected to debates, given that it bore the name of Dong Shuo, a refugee Yan minister and the material cultures- which tellingly featured a grand procession of cataphracts and foot soldiers that are more close in design to that of northern Chinese states.

ALTERNATIVE EXAMPLES

JZWM-021B 1/6 Chinese Military General: Liu Yu 

Action figure by JiaoZong Model and LongYuanGe Studio.

An alternative example of this era's cataphract panoply, which bears auxiliary attached chest plates. Unlike the chronicle of war and strife laden in the earlier sections. The south followed a different destiny as the north descended into a long century of high intensity wars. Strangely, even after the political miracle at the Fei River, Jin was not saved- rather, even with the realm saved, the Sima Emperors of the south rotted instead. 

Though competent enough of a sovereign in his early and middle reign, Emperor Xiaowu of Eastern Jin was a hedonist and lush. According to the Book of Jin he was murdered by a jealous concubine who smothered him to death. Worse, in his wake, the throne was passed to a son that was so mentally handicapped he was not able to speak, dress himself, or even signal whether he was hungry or full. 

JZWM-021B 1/6 Chinese Military General: Liu Yu 

Action figure by JiaoZong Model and LongYuanGe Studio.

The studio actually offers 2 head versions of the figure, in youth and also old age.

Notably, this extremely severely mentally handicapped Emperor An of Jin was not the 1st of the Jin Emperors to be very mentally handicapped, in fact Jin had two such Emperors. Despite being descended from the cunning Sima Yi, the Grey Eminence of Cao Cao's Wei dynasty and nemisis of the sagely Zhuge Liang-  almost a century earlier when the Jin still controlled both the north and the south and before the vassal auxiliary tribes of Hu rebelled, the Jin had another Emperor (Emperor Hui) who was also mentally handicapped. In fact it was precisely because of his gullibility and incompetence, that his various brothers, uncles, and other male relatively came to blows in the War of the Eight Princes that caused Jin to fatally lose control of the north. Similarly, in the given state of the Emperor, true lever of the state fell into the hands of several powerful ministers and regents.

Art by: 嘣咕噜霸霸咕噜嘣

Since the relocation of the Jin to the south, the relocated Eastern Jin court (317–420 AD) at Jiankang (modern Nanjing) was entirely stripped of its traditional Guanzhong and Central Plains geopolitical base. Deprived of this old elite, the Sima imperial house survived by engineering a delicate, highly financialized, and militarized power-sharing system. Instead of an absolute autocracy, the Eastern Jin functioned as an oligarchic coalition dominated by Northern Émigré Clans (Qiaoxing 侨姓), in uneasy alignment with Southern Indigenous Elites (Wuxing 吴姓) and unlike the past- where the court did have more direct authoritarian imperial power- now saddled with a weak emperor, the power blocks truly did not bother to rein in their own ambitions.

The lush and scenic Jiangnan (lit. "South of the River") landscape of lakes and manicured ponded gardens and misty rivers. Such a context where an exiled northern court- utterly deprived of the old Han origin in the Yellow River Central Plains, would be repeated several times in the future with a capital in the south.

For context: Southern Indigenous Elites (Wuxing 吴姓) - Wuxing literally means, the Great "Wu" clans- as great land owning clans that were powerful in the south when the region was part of Eastern Wu of the 3 Kingdoms period kingdom of Wu under the Sun clan. When the Jin (after relatively peacefully usurping Cao Wei and annexing Shu Han) conquered Eastern Wu in 280 CE, -true to the earlier relatively peaceful conquest, it did not liquidate the southern gentry. Instead, Jin left their local economic and land bases intact to avoid costly insurgencies. Despite this surface level magnanimity, throughout the Western Jin period when the realm was unified and the heartland was in the north, the central government in Luoyang treated former Wu elites as conquered subjects, colloquially mocking them as "Slaves of the Wilds" (Wangnu 亡虜) and always denied them of high posts.

 

However with the loss of Jin's old power base and heartland in northern China, and relocation among these already long entrenched local magnates, the earlier largely status quo minded incorporation created a dynamic of profound colonial alienation. When the old court remnants and the northern clans were forced to flee south in 317 AD, they were all entering into the backyard of the Wuxing. The northern émigrés were destitute refugees, but they claimed supreme political authority by virtue of their dynastic legitimacy. The Wuxing were multi-generational, fabulously wealthy landowners with private militias, but they possessed zero central political clout. Because the Western Jin court treated the Wuxing as untrustworthy outsiders for 30 years, the Wuxing developed an equal and opposite contempt for the Sima court. 

To preserve power among themselves, the newly arrived northern clans unlawfully seized local farmland and water rights for themselves- what's more they ensured by law, high offices and appointment would be nearly exclusively kept among themselves definite solely by lineage and seniority and not by merit, exemplified by the saying: "No humble families in the upper ranks, no powerful clans in the lower ranks."

Paranoia of the northern émigré actually created the gauntlet that turned on the throne. The uneasy and distrustful equilibrium broke down ironically due to the rise of the Beifu Army (北府兵)- the same "Northern Command" Army that saved the south a decade ago at the Fei River against Fu Jian's ambitious southern gambit. Originally organized as a way to coalesce committed tough northern refugees from the Huai River region into a dedicated arm of the throne, the Beifu Army evolved into a professional, highly lethal fighting force. Because it operated outside the traditional pedigree framework, it became a vehicle for merit-based advancement. Ultimately, a military commander of humble social origins, Liu Yu, seized control of this army.

Liu Yu was born into the absolute fringes of the northern émigré class in Jingkou (modern Zhenjiang, Jiangsu). Although his genealogy claimed descent from Liu Jiao (brother of the Han founder Liu Bang), his immediate family was impoverished. In his youth, he survived as a peasant, woodcutter, fisherman, and chronic gambler~ occupations that earned him deep contempt from the refined aristocrats in the southern court. His path to power was entirely institutionalized through the Beifu Army. Liu Yu enlisted as a low-ranking officer. He distinguished himself through raw tactical brilliance and immense personal physical prowess during the suppression of local massive peasant uprising led by Daoist sects. 

THE TRAITOR | THE SAVIOR

The catalyst for Liu Yu's political ascent was the usurpation of Huan Xuan who declared his own Huan Chu dynasty in 403 AD who- in his bid for power, brutally slaughtered most of the top Beifu commanders. Huan Xuan was also a descendant of the legendary Huan Wen who attempted the northern expedition decades past- whose clan was one of the most powerful lineages in the southern court, such episodes really reflect the potential obstacle such a loyal imperial army posed to an existing clan of military renown. One year later in 404 AD, Liu Yu launched a daring counter-coup from with a coalition of low-to-mid-tier Beifu officers. He defeated Huan Xuan, restored the mentally handicapped puppet Emperor An of Jin to the throne, and assumed de facto control of the court as Grand General. 

To consolidate his domestic hegemony over lingering aristocratic factions and the rival military command at Jing Province, Liu Yu embarked on highly ambitious Northern Expeditions for the next decade designed to achieve undisputed military legitimacy and remove all threats to the throne within and without. The result was an extreme fortuitous success unseen in the south for half a century. In his well provisioned and well drilled northern march which included both combined naval and land logistics, Shandong was retaken, Sichuan was retaken, and after securing all of the south from internal threats, his forces moved up the Huai and Yellow River systems with the navy. 

Luoyang and Chang'an: His armies even managed the seeming impossible and captured the ancient capital of Luoyang in late 416 AD. By 417 AD, utilizing the famous "Queyue" or "Crescent Moon Formation" 却月阵 where he deployed well drilled crossbowmen infantry in a dense clam shelled "Crescent Moon" of wagon forts on a bank flanked by  riverboats- he utterly slaughtered the elite Northern Wei cavalry on the banks of the Yellow River- he breached the Tong Pass and successfully conquered Chang'an, thus for the first time in more than a century, securing both of the vital old capitals and much of the southern bank of the yellow river- the old traditional Chinese heartland, for the Jin. 

The Queyue Formation 却月阵 (lit. "Creascent Moon") is basically a wagon fort but with a nearby flanking navy. The naval transport drops an army along the banks, and with the rear well secured, the half- shell of shielded wagons, carrying disciplined blocks of infantry and crossbowmen behind, were able to shoot at coming cavalry and infantry with impunity as if they are defenders in a siege and with their rears well prevented from a flanking attack.

Wuguang Wagon 武刚车 from later dynasties: in this later version they are presented as a hybrid of a wheelbarrow and mobile pavise screen. As such, whole trains of supply wagons can~ if needed, quickly rearrange into a defensive wagon fort. 

For the first time since the fall of Western Jin, the ancient ancestral heartlands of Guanzhong and the Central Plains were restored to southern Chinese control. However, this apex was short-lived. When his trusted civilian deputy in the southern capital, Liu Muzhi, died suddenly, Liu Yu feared an aristocratic or military coup at his rear. He chose to abandon Chang'an to rush back south. Deprived of supreme leadership, the southern garrisons left in Chang'an collapsed shortly after under the onslaught of Helian Bobo’s Hu Xia state.

Though the northern conquests partially fractured, the political capital Liu Yu gained was absolute. In 420 CE, he engineered the abdication of Emperor Gong of Jin, bringing an end to the Sima dynasty and establishing the Liu Song Dynasty (刘宋). Breaking with historical precedent to prevent a Sima restoration, Liu Yu ordered the deposed emperor suffocated to death, setting a bloody template for future dynastic transitions. 

NEW EQUILIBRIUM

As Emperor Wu, his brief reign (420–422 AD) was defined by radical institutional restructuring aimed at reversing the chronic weaknesses of the Eastern Jin: Liu Yu aggressively implemented "Nativization" policies. Northern émigrés were integrated into the local southern administrative districts, and subjected to state taxation and corvée labor. This shattered the independent fiscal bases of the elite clans and filled the state treasury.

Abandoning the previous regime's rule by oligarchic coalition approach. Liu Yan strictly limited the sizes of private military retinues held by the aristocracy. To balance the volatile geopolitical axis between the court and the upstream military stronghold, he instituted a rule that major military commanderies could only be held by imperial princes of the Liu bloodline, stripping the previous powerful clans of independent territorial governorships and integrating them under a strict, imperial umbrella. While allowed some traditional privileges to the great clans, mechanically in matters of statecraft, He staffed the core executive organs of the imperial court: specifically the positions handling state secrets, documents, and military decrees (Dianzhi)- with Hanmen (寒門), highly capable individuals of humble or low-born origins who owed absolute loyalty to the throne rather than a clan pedigree. 

 Liu Yan, depicted (with alternative headpiece for model) in the crown and robes of later Southern dynasties- specifically that of the Chen Dynasty's Emperor's portraits.

Liu Yu died in 422 AD while planning another massive northern expedition against the rising Northern Wei. Liu Yu is often evaluated as the archetypal sternly (but merit based) founding "soldier emperor" who reformed and solved the structural paralysis of the earlier regime but introduced a new systemic vulnerability that radically swung the pole and vulnerabilities in the opposite direction.

Later portraits depicting Chen Dynasty Emperors 

Instead of a lumbering oligarchy, albeit one with enough local incentives to preserve their own interests. By concentrating all real political and military power within the imperial family and a highly centralized autocracy with its own secret police and imperial maul, he paved the way for the nature of the fall of his own dynasty as well. The Liu Song- despite being the most military capable of the procession of following "Southern" Dynasties, would also be one of the bloodiest. 

Its short following 30 years were characterized by internal bloody succession crises that plagued the rest of the dynasty. When subsequent emperors proved weak or unstable, they lacked the balancing and stabilizing mechanism of local status quo- minded rent seeking players that the old oligarchy had once provided, leading to rapid cycles of extreme dynastic fratricide where princes slew each other, and even uncles slew their nephews.

 遥望建康城，Looking toward Jiankang city (Nanjing capital)

小江逆流萦，the little river flows against the current

前见子杀父，in front, one sees sons killing fathers

后见弟杀兄。and behind, one sees younger brothers killing older brothers

LATER NORTHERN INCARNATIONS

Armored cataphract at the later lap of the Northern & Southern Dynasties where the north was consolidated under a unified Northern Wei Dynasty, and the South resisted under its own carousel of short lived dynasties. The rider's cuirass is further protected by additional layer of auxiliary chest plates.

By the time Liu Song Dynasty took hold, the north had radically shifted yet again, whereby one of the fringe players- the Xianbei- led kingdom of Dai- rebranded itself as Wei (refer to after as "Northern Wei" to distinguish it from the Wei of Cao Cao) after securing a vital foothold in the Central Plains. Like the example of Former Qin before them, although the ethnic Xianbe~ Touba clan of Wei were initially new arrival outsiders who were significantly less acclimated to Han Chinese culture compared to the likes of Xiongnu who had been familiar with Han culture from the inside for over 3 centuries by then, and even other tribes of Xianbei as well (Former Yan's Murong clans were far more insiders compared to the Touba.)

 after securing Shanxi and Henan, the "Northern Wei"'s royal house rapidly Sinicized and like Former Qin- reunified all of northern China under 1 dynasty. The Northern Wei proved to be a dynamic and very unique dynasty in its own right. But that would be another tale. For another century and more, the North and South would wage wars against the other. Until the realm was ultimately reunited under 1 by the Sui dynasty.

Stylized art of the Nine Colored Deer by Snow Fish: the art 

imitates the style of Northern Zhou tomb mural art. 

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