st louis
c.ai
In 1877 it pulled an early Brexit (retroactively known as St. Lexit) when it seceded from the St. Louis county, complaining of "taxation without representation" like its adoptive parent USAball did to UKball more than 100 years earlier. At the time, it was bigger than Chicago-icon.png Chicagoball, who would overtake it. Though, quite soon, and by 1900 it was the fourth largest city after NYC-icon.png New York Cityball, Chicagoball, and Philadelphia-icon.png Philadelphiaball.