Watch video of the talk, "Why the Confederacy Lost: The Experiences of Robert E. Lee's Army of Northern Virginia."

Joseph Glatthaar, the Stephenson Distinguished Professor of history at the University of North Carolina at Chapel Hill, spoke at Vanderbilt University Feb. 8, 2011, as part of a College of Arts and Science-sponsored series of lectures about the Civil War. Glatthaar teaches about the Civil War and is the author of "General Lee's Army: From Victory to Defeat."