Units in the U.S. Army that trace their heritage and lineage to the Civil War are entitled to display a battle streamer for the Civil War on their flagpoles. This streamer is half blue and half gray, the color theme of the second ribbon design. Units with Confederate lineage use campaign streamers with the gray edge up and units with Union lineage use campaign streamers with the blue edge up.[6] The campaign lettering requires two distinct sets of streamers for each campaign, one set for each side.[5]
Civil War Campaign Medal - Wikipedia
Civil War Campaign Medal - Wikipedia