Slave labour was used sometimes, e.g. the Thailand-Burma railway. http://en.wikipedia.org/wiki/Burma_Railway http://en.wikipedia.org/wiki/Burma_Railway Five h

Slave labour was used sometimes, e.g. the Thailand-Burma railway. http://en.wikipedia.org/wiki/Burma_Railway http://en.wikipedia.org/wiki/Burma_Railway Five hundred men died for every mile of track laid, but hey, they had too many prisoners anyway!