American Civil War Uniforms- The Union and the Confederacy wore different uniforms to distinguish from eachother during the Civil War. The Union typically wore navy blue long frock coats while the Confederates wore grey on frock coats that were a tad shorter.
(2) Since this "essay" revolves around the Civil War it seems only fitting to give a brief overview of it. This infographic does just that. For a refresher course click on the image. [Civil War Facts Infographic from the National Park Service]