The Bắc Ninh campaign (6–24 March 1884) was one of a series of clashes between French and Chinese forces in northern Vietnam during the Tonkin campaign (1883–86). The campaign, fought during the period of undeclared hostilities that preceded the Sino-French War (August 1884 – April 1885), resulted in the French capture of Bắc Ninh and the complete defeat of China's Guangxi Army.