Of those that I can remember attending since 2003:
1-2 vs Stuttgart / 23rd July 2011 (friendly game, can't remember who scored, Findley perhaps?). There was about 50 Forest fans there. Magic.
Lewis McGugan with an early penalty and Robbie Findley got the winner in the second half.
The match was played in Aalen, about 60km from Stuttgart because of renovation works at the Mercedes-Benz Arena, and the Ganzi-Stadion (where Stuttgarter Kickers play) wasn’t available either.
https://www.vfb.de/de/vfb/aktuell/news-archiv/2011/281812-testspiel-gegen-nottingham-forest/