For nearly 150 years, historians and Civil War enthusiasts have argued over the Dahlgren Papers. Found on the person of Col. Ulric Dahlgren after a failed Union raid, these orders directed Northern soldiers to sack the city of Richmond, and assassinate President Jefferson Davis and his entire cabinet. But so much remains unknown. Were the papers real or forgeries? Who wrote them? Why did Dahlgren carry them on his person?The Dahlgren Papers is a historical...