"Brian Steidle"@en . "Steidle, Brian"@en . "Brian Steidle (born 1976) is a former Marine Corps captain, military and security operations expert, and author who had worked on publicizing the Darfur conflict in Sudan. Steidle wrote a book, The Devil Came on Horseback, about his experience, which was turned into a documentary film that premiered at Sundance in 2007."@en . "American Marine Corps officer" .