Hoàng Kế Viêm (1820–1909) was a Vietnamese General and a Dong'ge Grand Secretariat during the Nguyễn dynasty. He played a significant role in suppressing borderlands banditry and resisting French invasion during the second half of the 19th century.

The Treaty of Huế, concluded on 25 August 1883 between France and Vietnam, recognised a French protectorate over Annam and Tonkin. Dictated to the Vietnamese by the French administrator François-Jules Harmand in the wake of the French military seizure of the Thuận An forts, the treaty is often known as the 'Harmand Treaty'. Considered overly harsh in French diplomatic circles, the treaty was never ratified in France, and was replaced on 6 June 1884 with the slightly milder 'Patenôtre Treaty' or 'Treaty of Protectorate', which formed the basis for French rule in Vietnam for the next seven decades.