ure the southern stronghold of Saigon and, in June 1862, several provinces of southern Vietnam were ceded to the French as Cochin china with the signing of the Treaty of Saigon.
Through two more decades of conflict, the French gradually strengthened their hold on Vietnam, culminating in the establishment of French Indochina (French: Union de l'Indochine Française) in October 1887. Two years later, in 1889, the French colonists renamed the city Tourane, placing it under the control of the Governor General of Indochina. It came to be considered one of Indochina's five major cities, among Hanoi, Saigon–Cholon, Hải Phòng, and Huế.
Vietnam War
During the Vietnam War, the city was home to a major air base that was used by both the South Vietnamese and United States air forces. The base was considered one of the world's busiest airports during the war, reaching an average of 2,595 air traffic operations daily, more than any airport in the world at that time. The final U.S. ground combat operations in Vietnam ceased on 13 August 1972, when a residual force of the 196th Light Infantry Brigade stood down in Đà Nẵng. B Battery 3rd Battalion, 82nd Field Artillery Regiment fired the final U.S. artillery round and the 3rd Battalion, 21st Infantry Regiment finished their final patrols. This residual force was known as "Operation Gimlet"
