Victor Olivier de Puymanel (1768 in Carpentras â 1799 in Malacca), Nguyá» n VÃÂn TÃÂn () or TÃÂn in Vietnamese, was a French construction officer and a French Navy volunteer and adventurer who had an important role in Vietnam in the 18th century. He played a key role in the modernization of the army of Nguyá» n Phúc ÃÂnh (the future Emperor Gia Long).
Olivier de Puymanel was second-class volunteer on board the French warship Dryade. In 1788 he deserted his ship while in Pulo Condor. He soon entered into the service of the Vietnamese prince Nguyá» n Phúc ÃÂnh at the instigation of Pigneau de Behaine, who was setting up a force of French volunteers to help the latter regain the throne.
Olivier de Puymanel supervised the construction of the Citadel of Saigon, according to the design of the French engineer in Vietnam Théodore Lebrun.
He also trained Vietnamese troops in the modern use of artillery, and implemented European infantry methods in the Vietnamese army of Nguyá» n Phúc ÃÂnh. In 1792, Olivier de Puymanel was commanding an army of 600 men who had been trained with European techniques.
Puymanel built a fortress in Duyên Khanh, near Nha Trang, where he defended the city against Tây Sán forces, together with Pigneau de Behaine and Prince Cảnh. In 1795, Puymanel engineered the campaign to take Nha Trang.
Puymanel is said to have help organize train the men of Nguyen's army, while Dayot was in charge of the Navy. The results of these French efforts at the modernization of Vietnamese forces were attested by John Crawfurd, who visited Huế in 1822:
Olivier de Puymanel also worked on the cartography of the Vietnamese coast, together with Jean-Marie Dayot, another French officer in the service of Nguyá» n Phúc ÃÂnh.
Pigneau de Behaine and Puymanel seem to have disliked each other, and Pigneau was rather unimpressed with Puymanel's drinking habits and reliance on Saigon prostitutes.