Question: Christopher Bassford is an American military historian, best known for his works on a Prussian military philosopher that died in what year? 
Context: Christopher Bassford (born 1953) is an American military historian, best known for his works on the Prussian military philosopher Carl von Clausewitz.  Bassford graduated from the College of William and Mary with a degree in history and honors for his dissertation on tactical nuclear weapons and completed his MA in American diplomatic history at Ohio University.  Subsequent to receiving his MA, he served five years on active duty as a U.S. Army field artillery officer, with tours in Korea and Germany.  He completed a Ph.D. in modern European history at Purdue University and became director of studies in the theory and nature of war at the U.S. Marine Corps (USMC) Command and Staff College, then associate professor of National Policy Issues at the U.S. Army War College.  He was Professor of Strategy at the National War College (NWC), in Washington, D.C., from 1999 until 2012, when he joined the faculty of the College of International Security Affairs (CISA) as part of the JSOMA program supporting U.S. Army Special Operations Command (USASOC).  He is the webeditor of The Clausewitz Homepage, a large educational website that has been on-line since 1995. Robert Cowley is an American military historian, who writes on topics in American and European military history ranging from the Civil War through World War II.  He has held several senior positions in book and magazine publishing and is the founding editor of the award-winning "MHQ: The Quarterly Journal of Military History"; Cowley has also written extensively and edited three collections of essays in counterfactual history known as "What If? " Sherman L. Fleek is an American military historian.  He was born at Hill Air Force Base and raised in Layton, Utah.  His work specializes on Mormon military history, particularly the history of the Mormon Battalion during the Mexican–American War.  He has also written on topics related to Latter-day Saint (LDS) history that are not always military in nature. Carl Philipp Gottfried (or Gottlieb) von Clausewitz ( ; 1 June 1780 – 16 November 1831) was a Prussian general and military theorist who stressed the "moral" (meaning, in modern terms, psychological) and political aspects of war.  His most notable work, "Vom Kriege" ("On War"), was unfinished at his death. Kimberly Ellen Kagan (born 1972) is an American military historian.  She heads the Institute for the Study of War and has taught at West Point, Yale, Georgetown University, and American University.  Kagan has published in "The Wall Street Journal", "The New York Times", "The Weekly Standard" and elsewhere.  She supported the surge in Iraq and has since advocated for an expanded and restructured American military campaign in Afghanistan.  In 2009 she served on Afghanistan commander Gen. Stanley McChrystal's strategic assessment team. Michael V. Gannon (April 12, 1927 – April 10, 2017) was an American military historian, academic, and former priest and war correspondent.  He was born in Oklahoma into a military family.  Following the death of his father in 1939, his family moved to Florida from Washington, D.C.  He attended St. Joseph Academy in St. Augustine, Florida and worked at WFOY-Radio, hosting a call-in show and reading ads, among other duties.  Later, he had a summer job as an announcer at Marineland when it was a SeaWorld-style attraction south of St. Augustine.  He spent most of his career in Florida and died in 2017. Richard E. Killblane is an American military historian and author.  He has served in the U. S. Army as an enlisted man, an officer and a Department of Army civilian.  Killblane is a veteran of Central American counter-insurgency and Operation Just Cause.  He currently serves as the Command Historian of the U.S. Army Transportation School at Fort Lee, Virginia and has traveled extensively in Iraq and Afghanistan to research convoy operations.  He has published numerous articles and books on military history and is considered an authority on military convoy security.  In 2003, Killblane co-authored "The Filthy Thirteen: The True Story of the Dirty Dozen" detailing the life and World War II 101st Airborne Division exploits of Jake McNiece. Jonathan M. House (born 1950) is an American military historian and author.  He is a professor emeritus of military history at the U.S. Army United States Army Command and General Staff College.  House is a leading authority on Soviet military history, with an emphasis upon World War II and the Soviet influence upon modern operational doctrine.  Together with David Glantz, he wrote multiple books on the Red Army operations on the Eastern Front, most notably the 1995 work, revised in 2015, "When Titans Clashed: How the Red Army Stopped Hitler". Bevin Alexander (born 17 February 1929 in Gastonia, North Carolina, United States) is an American military historian and author.  He served as an officer during the Korean War as part of the 5th Historical Detachment.  His book "Korea: The First War We Lost" was largely influenced by his experiences during the war.  Bevin has served as a consultant and adviser to several groups due to his military expertise, including work for the Rand Corporation, work as a consultant for military simulations instituted by the United States Army Training and Doctrine Command, and as director of information at the University of Virginia in Charlottesville, Virginia.  As of 2007, he is an adjunct professor at Longwood University, in Farmville, Virginia. John Coyne McManus (born 1965) is a military historian, author, and professor of military history at the Missouri University of Science and Technology from St. Louis, Missouri.  McManus has published eleven books on numerous American military history topics, including: the allied invasion of Normandy, American infantry soldiers, and the 7th Infantry Regiment.
Answer: 1831