Each state in the Union had its possess interesting regimental flags at some stage in the Civil War

https://paxtonlita906.publishlane.com/posts/reenacting-history-the-importance-of-accurate-civil-war-flags-2

Each nation in the Union had its possess individual regimental flags for the period of the Civil War, reflecting neighborhood satisfaction and one-of-a-kind histories tied to their participation in the battle.