February 21, 1862
Located in central Tennessee, Forts Henry and Donelson guarded the Tennessee and Cumberland Rivers with interconnecting roads and telegraph lines between the two Confederate fortifications. In the first week of February, 1862, General Ulysses Grant led a massive assault composed of more than 15,000 troops and gunships. Confederate forces evacuated Fort Henry on the Tennessee River and General Grant followed up with a successful assault on Fort Donelson, located on the Cumberland River.
The three maps seen here are examples of maps prepared to document the history of this campaign as opposed to planning maps. In this case, the three maps were prepared for the “Atlas to accompany the Official Records of the Union and Confederate Armies”, a one volume atlas designed to accompany the multi-volume textual history of the Civil War. Each of the maps bears “148.D⁴” in the upper left corner which is the unique numbering system used in the compilation of the Atlas. Maps numbered 1 to 147 are filed as part of the series of manuscript maps used in the compilation of the Atlas by the War Records Office and are filed in Records of the Adjutant General's Office, National Archives and Records Service, Washington, D.C.
United States. War Department. Corps of Engineers.. Sketch showing the relative positions of Fort Henry and Fort Donelson : with the roads connecting the two places 
1 ms. map : col. ; 40 x 55 cm.
Catalog record: http://lccn.loc.gov/2003630442
United States. War Department. Corps of Engineers. [Map of the environs of Fort Donelson, Tennessee, Feb. 1862].  1 ms. map : col. ; on sheet 26 x 40 cm.
Catalog record: http://lccn.loc.gov/2003630439
United States. Army. Corps of Engineers. [Original maps of Forts Henry & Donelson and vicinity]. . 1 map ; on sheet 50 x 65 cm.
Catalog record: http://lccn.loc.gov/80691156