Genealogy / Polish grandfather military record - "simple solider or commander?" [2]

we were always intriged to know what did grandfather did in the army, where was he stationed and in what years post the "formation" of Poland

I have addressed once to the central military archive and they can't find his personal file without additional details concerning his service (only the name, parents and city are know to us)

where else can I find possible information - e.g if he participated in the Polish-Bulshevik war which is a strong possibilty
most likely he was a "simple solider" and not a commander

Cheers from America
Ana

Law / Precedent in child adoptions from Poland and Polish citizenship. [7]

What is the fate of a child born Polish and later was adopted outside of Poland?
Is he entitled to a Polish citizenship?
are there any precedents or interesting trials I can read about in the internet concerning trials of adopted Polish children and their rights?

kind regards
Ana