thailand the free thai movement khabuan kan seri thai was a thai underground resistance movement against japan during world war ii during world war ii japanese forces invaded thailand early on the morning of december 8 1941 shortly after the attack on the united states at pearl harbor hawaii heavy fighting broke out as the thai military resisted however the prime minister field marshal plaek phibunsongkhram ordered a ceasefire at noon and thereafter entered into an armistice that allowed japan to use thai military installations in their invasion of malaya and burma 2b00mt5.jpg from pregnant​ thai View Photo