Editing Plaek Phibunsongkhram (section)

=== Alliance with Japan ===
After Franco-Thai War, Phibun declared that Thailand becomes neutral or non-aligned country until Japan invaded Thailand for invading Burma, Later Phibun was reluctantly forced to order a general ceasefire after just one day of resistance and allow the Japanese armies to use the country as a base for their invasions of the British colonies of Burma and Malaya. On 21 December Phibun signed a military alliance with Japan. The following month, on 25 January 1942, Phibun declared war on Allied forces, Phibun purged all who opposed the Japanese alliance from his government. Pridi Banomyong was appointed acting regent for the absent King Ananda Mahidol, while Direk Chainam, the prominent foreign minister who had advocated continued resistance against the Japanese, was later sent to Tokyo as an ambassador. The United States considered Thailand to be a puppet state of Japan and refused to declare war on it. When the Allies were victorious, the United States blocked British efforts to impose a punitive peace.