Robert Langdon joined the Australian Army in 1989 and was awarded several honours including the United Nations Medal for his services overseas. In 2004, he became a private security contractor in Iraq and Afghanistan, working with the US Army and civilian contractors. He was incarcerated in Aghanistan's notorious Pul-e-Charkhi prison, described as the world's worst place to be a westerner, from 2009 until he was pardoned in 2016. He lives in Australia.