Between 1405 and 1433, the fleet of China’s Ming dynasty crossed the South China Sea and the Indian Ocean seven times — as far as Arabia, East Africa, India. Then the program was shut down, and three centuries later the Europeans found a very different world in those waters. The question is not why China “fell behind.” More interesting is how the machine worked before it was switched off — and what might have happened if it had remained running.
Zheng He’s fleet was not merely ships, but a floating city. The first expedition, in 1405, included around 27,800 people: sailors, soldiers, interpreters, astronomers, medics, diplomats. To grasp the scale: this was the population of a mid-sized Chinese county seat of the time, packed into wooden hulls and sent across the ocean. The fleet was divided into five classes of vessels. Baochuan — “treasure ships” — carried diplomatic gifts and embodied the emperor’s power. Machuan — horse transports — carried horses and repair supplies. Liangchuan — provisioning ships — supplied rice, salt, dried meat. Zuochuan — transport vessels — carried people and cargo. Zhanchuan — warships — protected the convoy from pirates.
Supplying an armada like this required iron logistics. The fleet set out from Nanjing, passed through the ports of Fujian, then on to Malacca, Calicut, Hormuz, Mogadishu. At every port: replenishing supplies, repairing sails, diplomatic negotiations. The monsoons dictated the schedule: the winter northeast monsoon carried ships from China into the Indian Ocean; the summer southwest monsoon brought them back. Daily progress on long passages was modest — around 50 miles a day. The distance from China to India came to roughly 6000 miles, and the voyage to Calicut took months. Expeditions lasted two or three years.
Armed clashes happened, but rarely. In 1407, off Palembang on Sumatra, the fleet defeated the pirate squadron of Chen Zuyi: five thousand killed, ten ships burned, seven boarded and taken, while Chen Zuyi himself was executed in Nanjing two months later. In 1411, matters came to Ceylon: the ruler of Kotte lured Zheng He and two thousand soldiers inland, preparing to strike the squadron lying off Colombo. The Chinese took the capital, beat back the approaching Sinhalese army, and carried the king, his family, and his chief ministers off to Nanjing — where the emperor released them and placed an allied ruler on the throne. But overall, the policy was mild: a display of force, an exchange of gifts, the establishment of trading ties. The Ming did not seize ports forever or build colonies. This was ritual hegemony.
The Indian Ocean port network of those years was a variegated map of independent sultanates, Hindu principalities, and mercantile republics. Malacca controlled the strait between Sumatra and Malaya and lived off duties. Calicut, on the Malabar Coast, traded in pepper and textiles. Hormuz, in the Persian Gulf, moved goods between India, Arabia, and Mesopotamia. Mogadishu and Malindi, in East Africa, exported ivory, gold, ambergris. None of these ports was a hegemon. The Ming fleet arrived as a third force — not a conqueror, but not a supplicant either. Local rulers saw it as a partner or a threat, depending on circumstances. When the expeditions ended, the balance of power became local again. And a century later the Portuguese entered these waters — with cannon, forts, and every intention of staying.
The hottest point in the history of Zheng He’s fleet is the length of the baochuan. The History of Ming gives 444 chi, which converts to somewhere between 127 and 140 meters. If that figure is true, the “treasure ship” was larger than any wooden vessel built in Europe before the nineteenth century. But archaeology, engineering, and common sense do not allow such luxuries.
A wooden hull 140 meters long is a structure at the very limit of the material’s strength. Wood handles bending worse than steel, and the longer the hull, the more violently waves “break” it. Xing Yuan’ou’s engineering calculations suggest a different ceiling: a vessel of the stated dimensions would have displaced 15–20 thousand tons, while the limit for an ocean-going wooden hull is about 7000 tons, and beyond 90 meters wood cannot bear the load at all. Bulkheads, which give a Chinese junk strength across the hull, work against it lengthwise. Joining the masts is a separate headache: a baochuan carried nine masts, and on a hull like this they would have had to be assembled from several trunks, rising toward a hundred meters high, with reinforced bases. Chinese shipwrights had neither trunks of that kind nor materials capable of joining them.
Archaeology in Nanjing produced indirect evidence. Excavations in 2003–2004 at the “Treasure Shipyard” — a separate site, not to be confused with Longjiang — uncovered a dock 421 meters long, just 41 meters wide, and four meters deep. A hull nearly fifty meters wide would not fit into such a dock, while clusters of supports on the bottom suggest ships no longer than 75 meters. Rudder stocks were also found: one, 11 meters long, back in 1957, and three new ones of roughly the same size. Attempts were made to derive a hull length of 150–166 meters from them using a formula for modern steel vessels — a dubious operation, since none of the rudder blades themselves survived.
So where did the figure of 444 chi come from? One hypothesis is a scribal error or an exaggeration by chroniclers eager to glorify the imperial fleet. Another is confusion between the length of a ship and the length of the entire squadron drawn up in line. A third is the use of a different chi: in different Chinese provinces, the chi ranged from 0.26 to 0.36 meters. Using the smaller chi, 444 comes out to around 110 meters — but even that is too much for wood. The fourth is that it was a symbolic number: 444 may be a ritual rounding, not an engineering specification.
The most plausible reconstruction, based on physics and archaeology, gives a length of 60–75 meters, a beam of around 14 meters, and cargo capacity approaching 2000 tons. That is still an enormous vessel for the fifteenth century — larger than Columbus’s carracks or Portuguese naus. But not a super-dreadnought. To me, the argument over dimensions is a clash between two kinds of sources: text, which loves exaggeration, and physics, which forgives no mistakes.
After the seventh expedition in 1433, the fleet never again sailed into distant waters. Zheng He died, probably that same year or shortly afterward. Part of the expedition archives was destroyed — perhaps deliberately by opponents of the program, perhaps simply lost in bureaucratic routine. The legend of “the total burning of all maritime documents” is exaggerated, but the fact remains: little information about the voyages has survived, and not by accident.
The first reason was cost, and it is still disputed. The bill was enormous: ships, crew salaries, diplomatic gifts, provisions, protection. True, historians disagree: Duyvendak considered the expense unbearable, while Ray, Finlay, and Dreyer argue that the treasury was not overstretched and that the expeditions more or less paid for themselves. The return was not measured in silver: tribute came irregularly, while trade went on without a state fleet — through private merchants. Emperor Yongle, who launched the program, died in 1424, and his successors saw no reason to continue it.
The second reason was the northern frontier. The Mongols did not vanish after the fall of the Yuan. They controlled the steppe and regularly raided China. In 1449, the Oirats crushed the Chinese army at Tumu and captured Emperor Zhengtong. This was a catastrophe. The Mongol threat demanded men, fortifications, and supplies — the very things the fleet consumed. No direct debate of “fleet or frontier” survives in the sources, but the north’s priority is clear from the facts: between the last expedition and Tumu, the empire sent not a single squadron into the ocean.
The third reason was the struggle between court factions. The program was backed by eunuchs close to Emperor Yongle. Zheng He himself was a eunuch. Confucian officials, who dominated the bureaucracy, saw the expeditions as wasteful and humiliating for the empire: why spend money on “barbarians” living beyond the sea? After Yongle’s death, the officials’ influence grew, and they gradually strangled the program. This was not an ideological war of “isolation versus expansion,” but ordinary bureaucratic squabbling over budget and influence.
The fourth reason was logistics. Managing a fleet of three hundred vessels and nearly 28,000 people at a distance of 10,000 kilometers from Nanjing was a task requiring constant institutional support. You needed warehouses, shipyards, a network of informants in ports, a mechanism for dispatching reinforcements quickly. If the emperor’s will weakened, the whole system fell apart. The Ming created this machine for a specific ruler, but never built it permanently into the state apparatus. When the political wind shifted, the machine stopped.
There was no ban on all sea travel. Chinese merchants continued to trade with Southeast Asia, Japan, and India. The state simply stopped organizing expensive prestige expeditions. Private trade was a different economy: smaller ships, more compact crews, risks spread among merchants rather than borne by the treasury. At different times, the Ming dynasty restricted and permitted private maritime trade, but these were policy fluctuations, not an eternal “closure.” By the end of the dynasty, in the sixteenth and seventeenth centuries, Chinese traders were active throughout Southeast Asia, even though the state fleet was gone. China did not turn its back on the sea. It was simply that this particular form of oceanic expansion — prestige state expeditions — proved too expensive and politically fragile.
Counterfactuals are a dangerous game, but you can feel out the boundaries of the possible without making up fantasy. Let us imagine this: after 1433, the Ming dynasty preserves the institution of long-distance expeditions. Not necessarily every two years, but once a decade — enough to maintain a presence. The fleet continues to call at Calicut, Hormuz, Malacca, Mombasa. What changes?
First, trade networks. The Chinese state acquires permanent anchor points in Indian Ocean ports. No formal colonies, but missions, warehouses, perhaps small garrisons. Trade in spices, silk, and porcelain moves through both private merchants and imperial offices. Local sultanates tread carefully: the Ming fleet is a guarantee of order, but also a threat to independence. The regional balance of power becomes three-sided: Indian principalities, Arab merchants, the Chinese crown.
Second, competition with Europeans. The Portuguese appear in the Indian Ocean in 1498 — 65 years after Zheng He’s last expedition. If by then the Ming control the key ports, the Portuguese must negotiate or fight. The Ming navy of the 1430s is larger and more numerous than the squadrons of Vasco da Gama or Afonso de Albuquerque. But the Europeans arrive with cannon designed for broadside combat, and with a readiness to wage a long war of attrition. Chinese junks are powerful transports, but not ships of the line. China would not automatically win such a confrontation.
Third, the logistics of colonization. Europeans built forts, settled, married locals, created Creole societies. The Ming never displayed such a strategy. Zheng He’s expeditions were state missions, not streams of settlers. Turning maritime presence into durable expansion would have required a different social model — and there is no guarantee that fifteenth-century Chinese society was ready for it. The Confucian elite despised trade, while peasants were hardly eager to sail overseas.
Fourth, America. There is no evidence that the Chinese fleet sailed to the Americas before Columbus. Popular books about “Chinese maps of the New World” rest on forgeries or freewheeling interpretations. In theory, the fleet could have crossed the Pacific — the distance from China to California is comparable to the distance from China to Africa. But there was no motivation: the Indian Ocean offered spices, silk, gold, diplomatic prestige. The Pacific promised the unknown. Even if a stray storm had driven a junk onto the American coast, a one-off contact does not create a colony. You need infrastructure, will, money, years of effort. The Ming had none of this even in the Indian Ocean, where the gain was obvious.
Fifth, domestic politics. Continuing the expeditions would have meant the long-term strengthening of the eunuch and military factions tied to the fleet. The Confucian bureaucracy would resist. A split in the elite, a struggle over the budget, a weakening of central authority — all were possible. The Ming already suffered from corruption and factionalism, and permanent conflict over the oceanic program would have added another fault line to the dynasty.
The most honest answer is this: if the Ming had kept its fleet, the Indian Ocean would have become an arena of Chinese-European competition, but the outcome would have depended not on the size of the ships, but on the empire’s willingness to turn maritime presence into an economic and military system. Europeans won the colonial race not because their ships were better, but because they were prepared to stay, fight, settle, trade for centuries. Fifteenth-century China might have competed with them in Malacca or Calicut, but to do so it would have had to become a different country — and that is no longer a scenario you can calculate from the seven expeditions of a eunuch admiral.