Genealogy / Polish Army Arrests 1939-1941 Bialorus/Family Members Taken to Siberia [7]

I am doing research on my grandparents. Their last address that I keep coming up with in Poland somewhere between 1939-1941 or so is Marcinkance p. Grodno. I found a record from Karta listing an arrest of my grandfather from 1939-1941 in Bialorus. I can't seem to find where he was taken to though. They and I'm assuming the Russians, but am not quite sure, came and then took my grandmother and her son to a work camp on the railroad in Siberia. Her mother (Helena Zaleska, whom they wouldn't allow to go along) stayed behind. I am also trying to find out what happened to her as well. My grandparents did eventually meet up somewhere around the latter part of 1942 and ended up in a dp camp in Africa, before being sent to anothe dp camp in England. I'm trying to piece together where everyone was in between.

Does anyone know how to research this? There seems to be only information on Jewish people, but nothing on all the Polish people. From some information that I have it looks like some of the polish armed forces became part of the british armed forces around 1942.

Any help would be greatly appreciate!