This 230 page atlas is divided into seven parts. Part I, Missouri's Divided Loyalties, and Part II, Missouri's Five Seasons, provide an overview of Missouri's history from the initial settlement of the Louisiana Purchase Territories through the opening years of the American Civil War. The remaining parts cover the Confederate plan, the Confederate movement into Missouri and the Union reaction, the Confederate retreat and Union pursuit into Kansas, and the final Confederate escape back into Arkansas. The atlas has a standard format with the map to left and the narrative to the right. Each narrative closes with two or more primary source vignettes. These vignettes provide an overview of the events shown on the map and discussed in the narrative from the perspective of persons who participated in the events. In most cases there are two vignettes with the first from a person loyal to the Union and the second from a person who supported the southern cause. A few narratives have two or more vignettes from only the Union side. This was done to emphasize disagreements and struggles among senior leaders to establish a common course of action. Map 25, Decision at the Little Blue River, is a good example and the three vignettes emphasize the disagreement between Maj. Gen. Samuel Curtis and his subordinate, Maj. Gen. James Blunt on where to locate the Union defensive line.

This volume narrates the major battles and campaigns of the conflict, conveying the full military experience during the Civil War. The military encounters between Union and Confederate soldiers and between both armies and irregular combatants and true non-combatants structured the four years of war. These encounters were not solely defined by violence, but military encounters gave the war its central architecture. Chapters explore well-known battles, such as Antietam and Gettysburg, as well as military conflict in more abstract places, defined by political qualities (like the border or the West) or physical ones (such as rivers or seas). Chapters also explore the nature of civil-military relations as Union armies occupied parts of the South and garrison troops took up residence in southern cities and towns, showing that the Civil War was not solely a series of battles but a sustained process that drew people together in more ambiguous settings and outcomes.