Regular readers of Listverse will be familiar with the Trail of Tears. In one of the most shameful events in US history, thousands of Native Americans were forced to march from their homelands to land in Oklahoma. But the Trail was merely a dark warning of what was to come in the 20th century when “death marches,” a form of mass murder via walking and starvation, became horribly common. The Trail of Tears was awful, but the industrial revolution and assembly line–fed modern armies soon took death marches to new heights of cruelty.