The Treaty of Saigon was signed on 5 June 1862 between representatives of the colonial powers, France and Spain, and the last precolonial emperor of the Nguyễn dynasty, Emperor Tự Đức after the coalition's invasion during the Cochinchina campaign. The signatories were Louis Adolphe Bonard (France), Carlos Palanca Gutiérrez (Spain) and Phan Thanh Giản (Vietnam). Based on the terms of the accord, Tự Đức ceded Saigon, the island of Poulo Condor and three southern provinces of what was to become known as Cochinchina to the French. The treaty was confirmed by the Treaty of Huế signed on 14 April 1863.