Many regiments all over the Civil War carried particular flags that showcased their actual unit insignia

https://ericksigh824.birchreport.com/posts/a-closer-look-at-the-most-iconic-civil-war-flags-of-the-era

Many regiments all the way through the Civil War carried specific flags that showcased their exceptional unit insignia, fostering camaraderie and delight between troopers on the battlefield.