Đá cầu's long path from a Chinese military drill to Vietnam's official national sport runs through more than two thousand years, a colonial-era interruption, and — as of very recently — a genuinely dominant run on the world stage.
The earliest documented references to shuttlecock-kicking appear in China; other accounts trace it specifically to the Han dynasty (206 BCE–220 CE), where Chinese generals reportedly used the game to train and relax their troops as an alternative to football.
The game becomes known as "Chien Tsu," a Chinese term meaning "arrow" — the likely root of the English word "shuttlecock" — and becomes fashionable enough among the aristocracy that a legendary player becomes part of the game's own folklore; see The kicker who became a warlord in a novel, below.
Under Vietnamese emperor Mai Hắc Đế, shuttlecock-kicking is already in use as a way to train soldiers' physical fitness; under the later Lý and Trần dynasties, it becomes a regular feature of major festivals and victory celebrations.
Widespread hardship under colonial rule leaves little room for folk pastimes to flourish, and đá cầu, like many traditional games, recedes from public life for decades.
Đá cầu is formally included as a traditional sport in the Hội Khỏe Phù Đổng, Vietnam's national school sports festival, marking the beginning of its modern revival.
Vietnam's General Department of Physical Training and Sports issues the country's first official rulebook for đá cầu; the following year, the first national championship is held and a standardized competition shuttlecock is developed.
At the World Shuttlecock Championship in Hagen, Germany, Vietnam's national team wins 7 of 7 gold-medal finals it contests, against more than 150 athletes from 13 countries and territories — an emphatic confirmation of the country's status as the sport's dominant force on the international stage.