Hellfire Pass is a part of Thai-Burmese Railway (the Death Railway) that Japanese military built in World War II as a way to invade India and battle with Britain military. There are many parts of the Death Railway that are stones, mountains, cliffs, and abysses. They therefore were excavated so that trains could be able to pass. Hellfire Pass is the biggest point in this railway. The excavation and construction were very difficult and many labors and captives were treated cruelly. And since a lot of them died here, this name has been used.