- Span
- 1276 – 19 March 1279
- Place
- Yamen, Xinhui, Guangdong
- Form
- Turning point — One chain of events, read in sequence.
- Published
- 2026-09-23
What made it possible
- The Yuan had taken the Song capital Hangzhou in 1276 and captured the emperor's mother and the court, but two princes escaped south with a residual fleet.
- Song naval power had been the state's strongest arm, and the Yangtze delta's shipyards could still outbuild the Yuan, so the war's last phase was fought on water.
- The Yuan had acquired a navy by absorbing defecting Song commanders and their fleets — the same ships and crews changed sides rather than being sunk.
- South China's terrain and river system made cavalry useless, which is why the conquest took thirteen years from the first invasion in 1268.
Who acted
- Zhang Hongfan
- Yuan naval commander; blockaded the bay and cut the Song fleet off from fresh water
- Lu Xiufu
- Song chancellor who carried the eight-year-old emperor Zhao Bing into the sea
- Zhang Shijie
- Song fleet commander; chained his ships into a fixed line, which removed his mobility
- Kublai Khan
- Great Khan and founder of the Yuan; had proclaimed the dynasty in 1271 and moved his capital to Dadu
Xiangyang, and why it took five years
The Yuan could not move south while Xiangyang held, because the city controlled the Han river route into the Yangtze plain. The siege lasted from 1268 to 1273 and was decided by artillery: counterweight trebuchets, built to specifications supplied by engineers from the Ilkhanate, could throw stones heavy enough to break the walls that earlier siege engines had merely dented.
The defenders held on because they could resupply by water at night, until the Yuan built a chain and a pontoon across the river to cut the route. When Xiangyang fell, the way to the Yangtze and then to Hangzhou was open, and the campaign moved in three years from a border war to the capture of the capital.
The last fleet, and how it was lost
At Yamen the Song had about a thousand ships carrying perhaps 200,000 people, including the court, its records and the families of the soldiers. Zhang Shijie chained the largest vessels together in a line to prevent desertion and to present a solid front — a decision that made tactical sense on a river and fatal sense in a bay, because the fleet could not pivot or retreat when the Yuan attacked from the undefended side.
The Yuan cut the fleet off from the shore, took the fresh water sources, and attacked with fire ships on 19 March. The Song line held for a day and then broke; the ships that were not burned were captured, and the emperor drowned with his chancellor. Zhang Shijie escaped with a portion of the fleet and drowned in a storm weeks later.
- Song fleet: roughly 1,000 ships, of which the largest were chained in a cordon.
- People aboard: commonly estimated at 100,000–200,000 including non-combatants.
- Duration of the battle: about one day, 19 March 1279.
- Yuan fleet: chiefly ships and crews taken over from Song defectors.
What the Yuan did with the south
The Yuan did not raze the Song administrative system; they kept the circuits and magistracies and placed Mongol and Central Asian officials at the top of a hierarchy in which Chinese officials continued to run the paperwork. The new element was the province — a large unit with a governor holding military and civil authority — created because the steppe court wanted fewer, more directly controlled regional commands.
The result was a state that could move grain from the Yangtze delta to Dadu by canal and sea, and that for the first time taxed the whole of agricultural China through one set of registers. That capacity, not the battle itself, is what the Ming inherited when they replaced the Yuan in 1368.
Sources
The facts in this entry were checked against the reference works and archives below.
- Yale Avalon Project — https://avalon.law.yale.edu/
- UNESCO World Heritage Centre — https://www.unesco.org/en/world-heritage
Consequence: short and long
Immediately
The Yuan ruled a unified China for the first time since the Tang, and the boundary between north and south that had held since 1127 disappeared as a political fact.
Over the long run
The Yuan kept the Song's provincial framework but reorganised it into roughly ten large provinces, and that grid — with its boundaries deliberately drawn to cut across mountains and river basins rather than follow them — is the ancestor of the modern Chinese province map. The conquest also integrated the south's economy into a single imperial tax system, which is what allowed the Ming and Qing to run a fiscally centralised state on a continental scale.
The usual misconception
That the Song were destroyed by Mongol cavalry. The last fifteen years of the war were fought mainly on water, by fleets built in Chinese shipyards and often commanded by defected Song officers. Cavalry decided the Xiangyang campaign; naval logistics decided the conquest of the south.
Sources
- Song Lian et al., History of Yuan (Yuanshi, 1370) — Compiled under the Ming from Yuan records; the primary account of the campaign.
- Tuotuo et al., History of Song (Songshi, 1345) — Contains the court's own record of the flight south and the end at Yamen.
- Morris Rossabi, Khubilai Khan: His Life and Times (1988) — Treats the conquest of the Song as the central project of Kublai's reign.
Editorial note: Annals Fold is written for general readers and gives one reading of a contested record, not professional historical, legal or academic advice. Dates and interpretations shift as scholarship does, so check the sources above before relying on this entry.
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