The siege of Tuyên Quang was an important confrontation between the French and the Chinese armies in Tonkin (northern Vietnam) during the Sino-French War. A French garrison of 619 men, including two companies of the French Foreign Legion, successfully defended the French post of Tuyên Quang against vastly outnumbering Chinese forces in a four-month siege from 24 November 1884 to 3 March 1885. 'Tuyên Quang 1885' remains one of the Legion's proudest battle honours.