The base map is a portion of a map created by West &amp; Johnson and published in Richmond in 1862.  It was downloaded from the US Library of Congress, and modified by TwoScarsUp by adding circles for points of interest involving the Wytheville raid made by Union Cavalry during July 1863 in southwestern Virginia.
West &amp; Johnson
US Library of Congress - <a rel="nofollow" class="external autonumber" href="https://www.loc.gov/resource/g3880.cw0475500/">[1]</a>