The Franco-Chinese War lasted from September 1881 to 1885.
Hanoi seized by France in April 1882.
25 August 1883 Hue treaty between the emperor of Annam and France.
11 May and 9 June 1884 Treaties of Tien Tsin; China signed the Hue treaty but the same month attack and
It ended with China giving up its sovereignty over Annam and Tonkin.
The treaty ending the war was signed on June 9, 1885.
These territories were later included into French Indochina.
See also: Battle of Foochow