(This article is about the association football rivalry in the United States. For other uses, see King's Cup (disambiguation).) The Kings' Cup was a rivalry between Lou City and Saint Louis FC, members of the USL Championship. Both teams joined the second-tier league (then known as the United Soccer League) in 2015. Like the cities of both clubs, the rivalry takes its name from King Louis of France, (though not the same one - Louisville is named after Louis XVI while St. Louis after Louis IX,) which also explains the presence of the fleur-de-lis in both city flags and both teams' crests. While both teams are currently members of the USLC Eastern Conference, Saint Louis has often been a member of the USLC Western Conference instead, due to its presence near the very center of the country.