Each state within the Union had its very own pleasing regimental flags for the time of the Civil War

https://zionzikt868.silverstonebrief.com/posts/preserving-history-the-importance-of-reenactment-quality-civil-war-flags-2

Each country within the Union had its very own detailed regimental flags during the Civil War, reflecting native pride and exclusive histories tied to their participation in the clash.