Siam tended to Japan in World War II, and was occupied by Japan in 194 1 and declared to join the Axis. 19411On February 7th, Japan launched the Pacific War, and Japan and Siam signed the Treaty of Japan-Thailand Offensive and Defensive Alliance. 1942 65438+1On October 25th, Thailand declared war on Britain and the United States, and Japan once ceded part of its land occupied in Myanmar and northern Malaya Peninsula to Siam. 1945 Japan surrendered in August 15, and Siam immediately declared the following day that "Siam 10/942 declared war on Britain and America invalid", and Siam's "declared war invalid" was recognized by the Allies. 1949 renamed Thailand. Thailand means "King of Thailand". Historically, Thailand can be proud that it is the only country in Southeast Asia that has not been colonized.