Elliot Ackerman is the author of the novels Sheepdogs, Halcyon, 2034 (coauthor), Red Dress in Black and White, Waiting for Eden, Dark at the Crossing, and Green on Blue, as well as the memoirs The Fifth Act: America's End in Afghanistan and Places and Names: On War, Revolution, and Returning. His books have been nominated for the National Book Award, the Andrew Carnegie Medal in both fiction and nonfiction, and the Dayton Literary Peace Prize. He is a contributing writer at The Atlantic and a Marine veteran who served five tours of duty in Iraq and Afghanistan, where he received the Silver Star, the Bronze Star for Valor, and the Purple Heart. He divides his time between New York City and Washington, DC.

Admiral James Stavridis, USN (Ret.), spent more than thirty years in the US Navy, rising to the rank of four-star admiral. He was Supreme Allied Commander at NATO and previously commanded US Southern Command, overseeing military operations through Latin America. At sea, he commanded a Navy destroyer, a destroyer squadron, and an aircraft carrier battle group in combat. He holds a PhD from the Fletcher School of Law and Diplomacy at Tufts University, where he recently served five years as dean. He received fifty medals in the course of his military career, including twenty-eight from foreign nations. He has published fifteen other books and is the senior military analyst for CNN and a Bloomberg Opinion weekly columnist. He is currently partner and vice chair, global affairs, of the Carlyle Group and the chair of the board of the Rockefeller Foundation.