The DOA 1908/09 lists your Georg (born 17.7.1870 in Neiße) as Hauptmann in der Schutztruppe für DSWA, Windhuk. He has a DSWA medal, PrKO4X and PrZM. This is NOT the Georg Graf Stillfried und Rattonitz whose ribbon bar was stolen from one of our members (Look here).
There is also a Felix Graf Stillfried und Rattonitz, born Neiße 18.8.1871, who is - strangely - Oberleutnant aD, no DSWA medal but a PrKO4X which probably has been earned overseas. Might be your wimp who left the army after that.
There is another one, Waldemar, born Neiße 8.4.1877, PrKO4X and PrZM, who is Oberlt in GGrenReg 3.