French-Thai War

The French-Thai War is fought between Thailand and Vichy France over certain areas of French Indochina that had once belonged to Thailand.Negotiations with France shortly before the Second World War had shown that the French government was willing to make minor changes in the boundaries between Thailand and French Indochina.

Following the Fall of France in 1940, Major-General Plaek Pibulsonggram (popularly known as "Phibun"), the Prime Minister of Thailand, decides that France's defeat gives the Thais an even better chance to regain the territories they had lost during King Chulalongkorn's reign.The collapse of Metropolitan France obviously makes the French hold on Indochina tenuous.

The isolated colonial administration is cut off from outside help and outside supplies.

After the Japanese invasion of French Indochina in September, 1940, the French are forced to allow the Japanese to set up military bases.

This seemingly subservient behavior convinces the Phibun regime that Vichy France will not seriously resist a confrontation with Thailand.

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