The Enrolled Missouri Militia, 4th Military District, order book documents the actions of the EMM in southwest Missouri from 1862 through 1863. The collection represents the bureaucratic task of organizing, supplying, training, disciplining, and maintaining a military presence in the Ozarks. The EMM conducted scouting missions and patrols to defend against guerilla activity, and also participated in January 8, 1863 Battle of Springfield, Missouri and January 9-11, 1863 Battle of Hartville.

Lyman Gibson Bennett enlisted in the 36th Illinois Infantry in 1861. Prior to the War he trained as a surveyor and civil engineer, working for the railroad. The military utilized Bennett’s skills as a cartographer, and assigned him to survey battlefields, road systems, and fortifications. Bennett’s diaries document his daily duties as both a soldier and an engineer for the military. His regiment participated in the Battle of Pea Ridge, which he describes in vivid detail.