Many regiments for the duration of the Civil War carried authentic flags that showcased their definite unit insignia
https://troynvgr831.moderncairn.com/posts/exploring-the-various-civil-war-flags-more-than-just-banners
Many regiments during the Civil War carried interesting flags that showcased their one of a kind unit insignia, fostering camaraderie and pleasure between infantrymen at the battlefield.