1989 South Florida television affiliation switch
On January 1, 1989, six television stations in the Miami–Fort Lauderdale and West Palm Beach, Florida, markets, exchanged network affiliations. The event, referred to in contemporary media coverage as "The Big Switch", was described as "Miami's own soap opera" and at times compared to Dallas and Dynasty because of the lengthy public disputes between multiple parties that preceded it.
Source: Wikipedia — 1989 South Florida television affiliation switch (CC BY-SA 4.0)