Many regiments for the period of the Civil War carried individual flags that showcased their categorical unit insignia
https://dominickuqhq312.greyhavendaily.com/posts/exploring-the-history-of-civil-war-flags-a-journey-through-time
Many regiments in the time of the Civil War carried entertaining flags that showcased their different unit insignia, fostering camaraderie and pride amongst soldiers on the battlefield.