Complex sentence: The team soon rose into the top positions and after winning its first national cup in 1992 it was further strengthened as Atlético Madrid disbanded its 1990 champion women's team and its best players joined its former rivals.
Split into simpler sentences: The team soon rose into the top positions and after winning its first National Cup in 1992. The club was further strengthened as Atlético Madrid disbanded its team, champion of the 1989--90 edition, and its best players joined its former rivals.