Many regiments at some point of the Civil War carried distinct flags that showcased their categorical unit insignia

https://cashhzpe788.bearsfanteamshop.com/historic-civil-war-flags-understanding-their-role-within-the-conflict

Many regiments in the course of the Civil War carried wonderful flags that showcased their one-of-a-kind unit insignia, fostering camaraderie and pleasure among squaddies at the battlefield.