The club's greatest success has been promotion to the American football Bundesliga, now the German Football League in 2023, the highest level league, in 1989 where it played for two seasons until 1991.

[1] A division title in the German Football League 2 in 2015 earned the club the right to return to the highest level of play in Germany, should it meet the licensing requirements, which they did.

The club won division championships at this level in 1986 and 1989 with the latter earning it promotion to the American football Bundesliga.

Between 2001 and 2006 the Invaders fluctuated between the third and fourth tier of the league system.

The Invaders were able to establish themselves in the GFL2 in 2014 and won the northern division in 2015, thereby earning the right to compete in the German Football League in 2016, taking up a spot made vacant by the withdrawal of the Cologne Falcons before the start of the 2015 season.