Indochina Theatre
Part of Great War
Siamese Army in Laos 1893
Siamese troops occupying French Laos during the war. Almost the entirety of soldiers in the Indochina Theatre were Indian and Indochinese.
Date June 5, 1915 – April 2, 1917
(1 year, 9 months and 3 weeks)
Location Drumontian Indochina
Result Allied victory
Flag of the United Kingdom United Kingdom:

Flag of Japan Japan
Flag of Thailand Kingdom of Siam

Flag of Royalist France French State

Flag of China 2 AoK Guangdong Clique

Commanders and leaders
Charles Hardinge Édouard Drumont
Albert Pierre Sarout → Ernest Roume
55,120 74,000
Casualties and losses
924 killed, wounded, captured or missing 2,132 killed, wounded, captured or missing

The Indochina Theatre was a military theatre of the Great War ocurring overseas in French Indochina. France, under the Drumontian Restoration and the Boulangist State, had acquired much of the region of Indochina through war of the local powers, and had proven to acquire even more land in south China under indirect zones of influence after the divisions of China following the Sino-French War and the collapse of Qing China in its Han territories a few years afterwards. British troops from Burma and Malaya invaded France soon after the declaration of war, aided with a Siam interested in recovering some territories. The Indochina Theatre ended soon, as the demoralised French corps surrendered and evacuated Indochina, which was occupied by British troops. However, it was a major event, as, despite the fact that most of French Indochina remained French even after the war, it sowed the seed of Southeast Asian nationalism in the major European colonies, especially the British Raj (where the Indochina Theatre started a series of protests that ended in the Calcutta Compromise and the formation of the Indic Federation.