1764 St. Louis founded as fur-trading post.
1795 Milwaukee founded as fur-trading post. But by 1830 over-hunting had exterminated fur-bearing mammals in Wisconsin.
1901 The eighth-place Milwaukee Brewers pack up and leave for St. Louis to become the St. Louis Browns. The Browns vault into second place in the American League in 1902 and improve the team winning percentage from .350 to .574, after 110 years still the largest year-to-year percentage gain in AL history.
1955 The last-place Milwaukee Hawks pack up and leave for St. Louis. Although while in Milwaukee the Hawks had never once made the playoffs, in St. Louis they make the playoffs six out of the next seven years and 12 out of the next 13 (winning the NBA championship for the 1957-58 season.)
1982 The St. Louis Cardinals deny the Milwaukee Brewers their only World Series title in franchise history.