The Battles of Bạch Đằng: How Iron Stakes Defined a Nation
Three times — in 938, 981, and 1288 — Vietnamese commanders used the same trick on the same river to humiliate invading fleets.
If you visit a Vietnamese school, sit in a Vietnamese living room, or walk through any historical museum, you will hear about Bạch Đằng. Three battles on the same tidal river in the north-east of the country defined Vietnamese military memory.
The trick was the same all three times: drive iron-tipped wooden stakes into the muddy river bed at low tide, lure the enemy fleet upstream at high tide, then attack when the falling tide impaled the ships.
938 — Ngô Quyền vs the Southern Han
The first and the most consequential. Ngô Quyền defeated a Chinese Southern Han fleet sent to reassert control over what had been a Chinese province for a thousand years. The victory ended Chinese rule and is conventionally dated as the start of Vietnamese independence.
981 — Lê Hoàn vs the Song
Lê Hoàn, founder of the Early Lê dynasty, used the same stratagem against a Song Chinese invasion fleet. Same river, same trick.
1288 — Trần Hưng Đạo vs the Mongols
The third and most famous battle, against the Mongols' third invasion of Đại Việt (Vietnam) under Kublai Khan. Trần Hưng Đạo — now Vietnam's most-named-after general — used the same river-staking technique to destroy the Yuan fleet of Omar Khan in a single afternoon.
This was the last serious attempt by the Yuan to take Vietnam. The Mongol Empire never tried again.
Why three centuries of the same trick worked
A few reasons:
- The Bạch Đằng has a strong tidal range. The mud is deep. The fleet commanders of three different empires apparently didn't read each other's mission reports.
- The Vietnamese side knew the river intimately — fishermen and farmers had used it for generations.
- The Vietnamese fleet was small and fast (river barges and shallow-draft boats); the invading fleets were heavier sea-going ships that couldn't manoeuvre easily once impaled.
What you can see today
The site is in Hải Phòng and Quảng Ninh provinces (north of Hạ Long Bay). The Bạch Đằng Relic Site preserves some of the original stakes, recovered from the riverbed in the 1950s and 1960s. The wood is over a thousand years old. They are unspectacular sticks. Standing in front of them is, somehow, still moving.