WI: France establishes a protectorate over Thailand?

What if Thailand had not managed to weather the tides of colonialism like Ethiopia concurrently did, and was subsequently absorbed into the French colonial empire like the other Indochinese states? Perhaps sometime around the Franco-Siamese War of 1893, or even later. What would be the effects of a French Thailand on the history of the country and its surrounding areas?
With Thailand firmly in French hands, would Britain end up demanding more concessions? They could pressure France to cede the areas of the Patani Sultanate to the south of the Kra isthmus, enlarging the British colony of Malaya, as compensation for the loss of a buffer state, imo. How does the continuation of Anglo-French conflicts in Southeast Asia affect the formation of the Entente Cordiale, if it even consolidates at all?
Could France, seeking to one-up the British, decide to build the Kra Canal in order to ease communications between the Indian Ocean and the South China Sea, and to decrease naval dependence on British Singapore for that?
What are the overall effects on Thailand itself? Would it be split into multiple associated states, like the rest of OTL French Indochina? What sort of impact would be brought by the adoption of French as another language of administration?
 
What if Thailand had not managed to weather the tides of colonialism like Ethiopia concurrently did, and was subsequently absorbed into the French colonial empire like the other Indochinese states? Perhaps sometime around the Franco-Siamese War of 1893, or even later. What would be the effects of a French Thailand on the history of the country and its surrounding areas?
With Thailand firmly in French hands, would Britain end up demanding more concessions? They could pressure France to cede the areas of the Patani Sultanate to the south of the Kra isthmus, enlarging the British colony of Malaya, as compensation for the loss of a buffer state, imo. How does the continuation of Anglo-French conflicts in Southeast Asia affect the formation of the Entente Cordiale, if it even consolidates at all?
Could France, seeking to one-up the British, decide to build the Kra Canal in order to ease communications between the Indian Ocean and the South China Sea, and to decrease naval dependence on British Singapore for that?
What are the overall effects on Thailand itself? Would it be split into multiple associated states, like the rest of OTL French Indochina? What sort of impact would be brought by the adoption of French as another language of administration?
Well, Thailand would drive on the right, for one.
 
It'd be very interesting in terms of power play within Indochina.

IOTL, the Indochinese Union was very beneficial to Vietnam as a state (not talking about the population, colonisation or otherwise...) as it created a state covering Cambodia, Laos and Vietnam in which the Viet were the biggest player, cementing their influence in the post-colonial world. Indeed, some writers (I think it's Goscha?) went as far as saying Indochina was a continuation (labeit involuntary) of Vietnam's imperial ambitions as it reached its furthest extant, covering its whole sphere of influence.
It's particularly important as said sphere of influence had always been playing against Siam. If Siam is in, that means that, in terms of wealth and population, the Viets are not the biggest, and the Emperor is not as big a figure (although it was very puppeted anyway).
If Siam gets into that, this changes the whole dynamic.

The other bit is about Cambodia. IOTL, the protectorate of Cambodia was framed as a defence against Siamese encroachment. This is particularly showing when the French took Angkor Wat from Siam and show the locals that France was actually restoring Khmer munificience.
If Siam is in, that whole dynamic goes to shit.
 
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