Tennessee
The three stars in the middle of the flag represent the three Grand Divisions of the state, East Tennessee, Middle Tennessee, and West Tennessee. The blue circle surrounding them symbolises their unity. The blue bar on the side is just that, a blue bar! The flag’s designer even admitted as much, saying “The final blue bar relieves the sameness of the crimson field and prevents the flag from showing too much crimson when hanging limp”.
Design is important!