In 1858,
Charles Rigault de Genouilly attacked Vietnam under the orders of
Napoleon III following the failed mission of diplomat
Charles de Montigny. His stated mission was to stop the persecution of Catholic missionaries in the country and assure the unimpeded propagation of the faith. Rigault de Genouilly, with 14 French gunships, 3,000 men and 300 Filipino troops provided by the Spanish, attacked the port of
Đà Nẵng in 1858, causing significant damages, and occupying the city. After a few months, Rigault had to leave the city due to supply issues and illnesses. The Franco-Spanish force in Saigon, now only numbering about 1,000, was besieged by about 10,000 Vietnamese forces from March 1860 to February 1861. Admiral Bonnard forced the entrance of the
Mekong river, and seized
Mỹ Tho. On 13 April 1862, the Vietnamese government was forced to negotiate and officially cede the territories of
Biên Hòa,
Gia Định and
Định Tường to France in the 1862
Treaty of Saigon, confirmed by the
Treaty of Huế (1863). in Paris in 1863. An embassy was sent to France under
Phan Thanh Giản in 1863, to try to recover the territories lost to France. Although Napoleon III initially accepted Phan Thanh Giản's plea, the agreement was finally canceled in 1864, under pressure from Napoleon's cabinet led by the Minister of the Navy and the Colonies
Chasseloup-Laubat. In 1864, all the French territories in southern Vietnam were declared to be the new French colony of
Cochinchina. In 1866, France started the exploration of the
Mekong river, with the objective of reaching the riches of China, under
Ernest Doudart de Lagrée and
Francis Garnier. They reached the
Yunnan, discovering that the Mekong was not navigable as far as China. They found out instead that the
Song-Koï river in
Tonkin would be a good alternative. In 1867 the provinces of
Châu Đốc,
Hà Tiên and
Vĩnh Long were added to French-controlled territory by Admiral La Grandière. Admiral Dupré became Governor of Cochinchina. negotiated by
Paul-Louis-Félix Philastre.
Protectorate over Annam and Tonkin (1883) was killed by the
Black Flags in 1883. In 1873,
Francis Garnier was put in charge of an expedition to
Tonkin, with the mission of protecting French interests there, following the troubles encountered by the French trader
Jean Dupuis. Credits were voted for, and a large force of 4,000 men and 29 warships (including 4
ironclads) was sent. Admiral
Amédée Courbet would be leading the force in Tonkin, while Admiral Meyer would operate in China.
Tonkin Campaign (1883–85) and Sino-French War (1884–85) , 16 December 1883. The next objective of the French was to take full control of the
Tonkin. In October 1883, Courbet was placed in command of the
Tonkin Expeditionary Corps. In December 1883, he led the
Sơn Tây Campaign against the
Black Flags. French casualties were heavy (83 dead and 320 wounded), but the Black Flags were greatly weakened as a result of the campaign. . The
Bắc Ninh Campaign (March 1884) was one of a series of clashes between French and Chinese forces in Tonkin (northern Vietnam) in the period. The campaign, which lasted from 6 to 24 March, resulted in the French capture of
Bắc Ninh and the complete defeat of China's
Guangxi Army. China, the traditional overlord of Vietnam, kept contesting French influence in the area and was supporting Annam as well as the Black Flags on its territory at the frontier with Tonkin. Although a treaty had been signed between France and China (11 May 1884 the
Tientsin Accord) promising Chinese evacuation from Tonkin, military confrontations continued as in the
Bắc Lệ ambush (June 1884). These tensions led to the
Sino-French War (1884–85), which ultimately forced China to totally disengage from Vietnam and confirmed the French possessions. ==French Indochina (1887–1945)==