NFL Europa was an American football league which operate in Europe from 1991 until 2007. Backed by the National Football League (NFL), the largest professional American football league in the United States, it was founded as the World League of American Football (WLAF) to serve as a type of spring league. In 1995, when the league was revamped after a two-year hiatus, the league was renamed the World League. In 1997, the league rebranded itself as the NFL Europe League or NFL Europe. After the 2006 season, the league's name changed again, this time to NFL Europa.