Baltimore Colts relocation to Indianapolis

On the night of March 28–29, 1984, Robert Irsay, then-owner of the Baltimore Colts of the National Football League (NFL) covertly moved the team to Indianapolis, Indiana, where it would begin play as the Indianapolis Colts in the 1984 NFL season. The city government of Baltimore, Maryland, had proved unwilling to replace the team's three-decade-old home stadium, and the Maryland General Assembly was on the verge of passing legislation allowing the city to seize the team via eminent domain.

Source: Wikipedia — Baltimore Colts relocation to Indianapolis (CC BY-SA 4.0)