A Symposium of Lectures and Articles on Military Mapping is an ongoing series adapted from presentations made by Earl B. McElfresh to Civil War Round Tables and Map Societies, from monographs accompanying published McElfresh maps, from articles published in various magazines as well as radio presentations broadcast by NPR affiliate WBFO in Buffalo, New York. This first section includes an introduction to the series entitled “Marching with Maps—Making the Military Maps that Remake the World.” Also included in this section is “Civil War Mapping and the Shenandoah Valley” which describes the efforts by opposing Confederate and Federal armies throughout the Civil War to accurately map the logistically and strategically crucial valley sheltered between the Blue Ridge and Allegheny Mountains. Earl B. McElfresh is a renowned cartographer and Civil War map historian. He has mapped over twenty battlefields for McElfresh Map Company. He is the author of Maps and Mapmakers of the Civil War (Abrams 1999) and is a frequent contributor to Civil War Times Magazine.