Key Facts
- Duration
- 4 years (1858–1862)
- Initiating parties
- French Empire and Kingdom of Spain
- Immediate pretext
- Execution of two Spanish Catholic missionaries
- Result
- Founding of French colony of Cochinchina
- Opening conflict
- First phase of French conquest of Vietnam
Strategic Narrative Overview
A joint French-Spanish naval expeditionary force launched operations in 1858, attacking Vietnamese coastal positions and progressively advancing inland. Napoleon III authorized increasingly larger military contingents as the campaign expanded well beyond its original punitive scope. French and Spanish forces subdued Vietnamese resistance across southern territories, establishing military and economic dominance over the Nguyễn state through a series of coordinated naval and land operations.
01 / The Origins
The campaign originated as a limited punitive expedition by France and Spain, responding to the execution of two Spanish Catholic missionaries in Đại Nam (Vietnam) under the Nguyễn dynasty. Napoleon III, pursuing imperial ambitions in Asia, used this pretext to authorize the deployment of a joint naval force, seeking economic influence and strategic footholds in Southeast Asia as European powers competed for colonial dominance.
03 / The Outcome
The campaign concluded in 1862 with France establishing the colony of Cochinchina in southern Vietnam, the first formal French territorial possession in Indochina. The Nguyễn court was compelled to cede territory and accept French dominance. This outcome inaugurated nearly a century of French colonial rule in Vietnam and set the precedent for the broader French conquest of Indochina.
Belligerents & Mobilization Analysis
Side A
2 belligerents
Side B
1 belligerent