Wishing to continue the league's presence in Berlin, the "DFB" elevated third-placed "Regionalliga" side Tasmania 1900 Berlin to the "Bundesliga" without the side actually having qualified and thereby enlarging the league to 18 teams almost by accident, a format it continued from then on except for one season. In 1991, 28 years after its interception, the "Bundesliga" finally became a league for all of Germany. After the German reunion, two clubs from the east, F.C. Hansa Rostock and Dynamo Dresden joined the league for the 1991–92 season and caused a one-off expansion of the league to 20 teams. The 58 top-level "Oberliga" clubs from 1962–63 that were not selected for the "Bundesliga" were mostly grouped in the new "Regionalligas". Only in Berlin did the bottom two teams, Viktoria 89 Berlin and SC Tegel have to drop from the first to the third tier, while in the Southwest Eintracht Kreuznach also found itself dropping to the "Amateurliga". In 1974 another step was taken to professionalise German football when the 2. Bundesliga was established.