Back Corps expéditionnaire du Tonkin French Korps Ekspedisi Tonkin ID Corpo di spedizione del Tonchino Italian Corpo Expedicionário do Tonquim Portuguese Quân đoàn viễn chinh Bắc Kỳ Vietnamese
| Tonkin Expeditionary Corps | |
|---|---|
 Soldiers of the Tonkin expeditionary corps in 1885 (from left to right : Naval Fusilier in coolie hat, Marine infantryman, Turco and Marine artilleryman). | |
| Active | 1883–1886 |
| Country | France |
| Role | Establishment of French protectorate in Tonkin |
| Size | 35,000 by summer 1885 |
| Engagements | Tonkin Campaign, Sino-French War |
| Commanders | |
| Notable commanders | Alexandre-Eugène Bouët Amédée Courbet Charles-Théodore Millot Louis Brière de l'Isle |
The Tonkin Expeditionary Corps (French: corps expéditionnaire du Tonkin) was a French military command based in northern Vietnam (Tonkin) from June 1883 to April 1886. The expeditionary corps fought the Tonkin Campaign (1883–86) taking part in campaigns against the Black Flag Army and the Chinese Yunnan and Guangxi Armies during the Sino-French War (August 1884–April 1885) and the period of undeclared hostilities that preceded it (August 1883–June 1884), and in important operations against Vietnamese guerrilla bands during the subsequent 'Pacification of Tonkin' (May 1885–February 1886).