World War II: Thailand declares war on the United States and United Kingdom.

World War II

1939–1945 global conflict

World War II or the Second World War was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all of the world's countries participated, with many nations mobilising all resources in pursuit of total war. Tanks and aircraft played major roles,…

Thailand in World War II

Thailand officially adopted a neutral position during World War II until the five hour-long Japanese invasion of Thailand on 8 December 1941, which led to an armistice and military alliance treaty between Thailand and the Empire of Japan in mid-December 1941. At the start of the…