One of the blokes who put the USSR flag on top of the Reichstag was a Georgian. Everywhere else in Europe, nationalist tensions were flying high.
How did the various non-Russian people (eg Kazakhs, Georgians, Armenians) in the formerly Russian Empire, now USSR, feel about fighting for their Russian overlords, who I'm guessing they probably weren't best pleased about being ruled by.
Well Georgians and Armenians held important posts in the USSR military complex and the science community lets not forget the Ashkenazi Jews who played a pivotal role in the creation of the USSR. I would say the USSR was a lot more inclusive than other empires
There was an Azerbaijani Soviet "Opa"(Grandpa in German), 94, who had coincidentally answered this question 2 times. You could check his answers here:
-2012 http://www.reddit.com/r/IAmA/comments/xi6ve/iama_92_year_old_azerbaijani_world_war_ii_veteran/
-2014: http://www.reddit.com/r/IAmA/comments/2dvsb1/iama_94_year_old_wwii_veteran_who_was_conscripted/