The modern Olympics started in 1896 and St. Louis held the third Olympic games in 1904 concurrently with the World Fair and it was a hot mess.

Sources:

"Much Wenlock" by Ben Johnson "8 Unusual Facts about the 1904 St. Louis Olympics" by Evan Andrews Britannica "St. Louis 1904 Olympic Games" "Remembering the Anthropology Days at the 1904 Olympics" by Nate Dimeo "The 1904 Olympic Marathon May Have Been the Strangest Ever" by Karen Abbott