If i'm allowed to make a suggestion n the rankstructur:
You are a Brigade, so the highest rank would be:
Brigadier (Brig) (<-Brigadier is the shortform of Brigade General.)
For the 2nd in Command of the Brigade i would suggest you the rank:
Stabschef (StbChef) (<-Is the Chief of the Staff)
The Staffofficerranks would be:
Oberst (Obst)
Oberstleutnant (OTL)
Major (Maj)
The normal officers:
Hauptmann (Hptm)
Oberleutnant (OLt)
Leutnant (Lt)
The Higher NCOs:
Adjutantchef (AdjChef)
Hauptadjutant (HptAdj)
Adjutantunteroffizier (AdjUffz)
Adjutant (Adj)
Lower NCOs:
Oberwachtmeister (OWtm)
Wachtmeister (Wtm)
Korporal (Kpl)
Rankers:
Obergefreiter (OGfr)
Gefreiter (Gfr)
Musketier (Musk)
Rekrut (Rek)
Miliziant (Miliz)
Just to make it more correctical
Sorry for the bad english,but it was late.