Answer:
I believe you are referring to The Burma Railway. The Burma Railwaywas built between 1940 and 1943 by civilian laborers, prisoners of war taken by the Japanese, and those impressed or recruited by the Japanese. Prisoners of war were sent to various destinations throughout the Pacific and Southeast Asia to provide forced labour for the Japanese army, with Australian prisoners of war forced to work on the Burma–Thailand Railway in 1942-1943. Millions of people were also transported by rail to killing centers and other killing sites in German-occupied areas between 1941 and 1944.