Mapping Occupation, a digital history project created by Gregory P. Downs and Scott Nesbit, provides groundbreaking insight into the role of the U.S. Army in the South during the Civil War and Reconstruction. Part spatial narrative, part exploratory map, there are many ways to experience this resource. Readers may like to explore the site in order, starting with and absorbing the home page before scrolling down to access more detailed information. Along the way, they will learn how and when the U.S. army enforced the Emancipation Proclamation, what that meant for the practical freedom of black men and women, and how the rail system played into these activities. Digital historians, in particular, may find the detailed Methods and Data sections illuminating, while anyone fascinated by the dynamism and messiness of Reconstruction will find much to appreciate on this visually and intellectually stimulating site.