​From Wikipedia, the free encyclopedia.   Brian Steidle is a former Marine 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. Steidle has shared his experience in Darfur with heads of state in the United States and abroad, addressed the U.S. Congress and the United Nations, and serves both as lecturer and advisor to several non-government organizations regarding their humanitarian efforts in Africa and other nations. Prior to his work in Darfur, Steidle, the son of a high-ranking U.S. Navy officer, served in the United States Marine Corps from 1999 to 2003 as an infantry officer, completing his service with the rank of Captain. Description above from the Wikipedia article Brian Steidle, licensed under CC-BY-SA, full list of contributors on Wikipedia.