Each state in the Union had its own designated regimental flags for the time of the Civil War

https://stephentkru765.cloudhinter.com/posts/reenactment-realism-how-civil-war-flags-bring-history-to-life

Each kingdom inside the Union had its possess specified regimental flags in the course of the Civil War, reflecting local pleasure and one-of-a-kind histories tied to their participation within the warfare.