ORDER OF BATTLE // January 16, 1941
Battle of Ko Chang
Estimated force strength by side, with confidence labels per surviving record.
Forces engaged
2 sides catalogued · combined 3,250–29,100 estimated
État français
950–12,500
Medium-confidence figure
Thaïlande
2,300–16,600
Medium-confidence figure
Battle context
The Battle of Ko Chang was a naval engagement during the Franco-Thai War in which French warships attacked a smaller Thai force, sinking two Thai vessels and heavily damaging a third with no French losses. Although the French achieved a clear tactical victory at sea, the strategic outcome was ambiguous: the engagement prompted Japan to intervene diplomatically, brokering a ceasefire that left Thailand in possession of the contested areas of French Indochina. Within a month of the battle, Vichy France and Thailand concluded a peace settlement ending the war. The result illustrated how battlefield performance and political outcome could diverge sharply — France won the naval action yet relinquished the territorial question it had fought to resolve, with Japanese regional influence serving as the decisive lever rather than military force.
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