From that site I linked:
Prior to the 1985 campaign, the USFL announced it's intention to switch to a fall schedule beginning in 1986 and to file an antitrust lawsuit against the National Football League. The change of playing season had severe ramifications for several franchises, many of which faced direct NFL competition in their cities. Fresh off their championship season, the Stars left their growing fan base in Philadelphia for the recently-vacated Baltimore. The Michigan Panthers threw in the towel and merged with the Oakland Invaders. The Pittsburgh Maulers called it quits after just one season. The Breakers were forced out of their new-found home in New Orleans and made Portland, Oregon their third city in as many years. All four moves were a direct consequence of the league's intentions to play in the fall. The Chicago Blitz also suspended operations, the Oklahoma Outlaws and Arizona Wranglers merged to form the Arizona Outlaws and the Washington Federals headed South to become the Orlando Renegades.
On the field in 1985, the relocated Stars overcame a slow start and won their second title. Doug Flutie became the third consecutive Heisman winner to sign with the league, and league play improved dramatically due in large part to the preseason consolidations. Several franchises did not fare very well, though. The San Antonio Gunslingers, Los Angeles Express and Houston Gamblers struggled to make it through the year. Negative headlines and near financial ruin plagued the league even as it was showcasing its best football.
In July of 1986, about a month before the league was to begin its first fall season, the USFL won its suit against the NFL, but incredibly was awarded just $1 (trebled to $3 under antitrust law) in damages. More than $160 million in debt, the league folded before beginning its first fall campaign.