How many Allied prisoners of war died during construction of the Burma Railway?

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Map showing the height of Japanese territorial expansion in 1942 during World War II, with a large hatched area covering much of East and Southeast Asia and the western Pacific, including parts of China, Korea, Southeast Asia, the Philippines, and numerous Pacific islands. Japan's home islands are shaded in solid red, while the expansion area stretches from India and Burma in the west to the Aleut — Burma Railway In World War II Japanese military forces quickly took advantage of their success at Pearl Harbor to expand their holdings throughout the Pacific and westward toward India. This expansion continued relatively unchecked until mid-1942. Then, after losing the Battle of Midway, Japan was forced on the defensive.

More than 12,000 Allied prisoners of war died during the construction of the Burma Railway. In addition to these Allied casualties, tens of thousands of forced labourers also perished while building the line to support Japanese forces during World War II.1