Producer and Director Matt Spangler was inspired by a 2009 article in The Washington Post that looked at elderly men in a village in Congo that served with the Belgian forces during the war. The idea sat with him for three years, until 2012, when he began contacting veterans organizations around the globe to try and locate any surviving veterans. By the end of the year, he had made contact with several veterans living in London, Johannesburg, and Malindi, Malawi.

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http://www.washingtonpost.com/wp-dyn/content/article/2009/08/03/AR2009080302959.html