Treaty of Saigon
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. The Vietnamese Emperor formally recognized French dominion over Cochinchina in 1874, in the 1874 Treaty of Saigon, negotiated by Paul-Louis-Félix Philastre.