This may be related to a strange end case that occured IN MECKLENBERG:
History :
1) Prussia DOWs Mecklenberg, Britain gets control
2) Prussia moves in kills >1< of the 2 garrison factors & take the other one POW.
3) I (France) am at war with both Prussia & Britain; move in & knock the
Prussian corp out.
4) Mecklenberg has a lapse of war with Prussia; POW is returned TO BRITAIN
5) Britain runs reinforcement; cannot place Mecklenberg POW because of
my occupation.
6) I load Britain turn; my garrison IN WURZBERG disappears.
Could you have either a bad pointer variable or a database record reference
that isn't set correctly & is confusing the WURZBERG garrison with the
Mecklenberg POW? If this is so; I think this may be a CRITICAL bug because
it could potentially vaporize any force on the board (such as Nappy & the full
#1 French corp)
Here is the screenshot of the setup before applying the British turn :


