If we talked about white Russian on Japan side fighting with Soviets I'd like to mention about Tuvan People Republic small comunistic state incorporated into soviet union in 1944. They send to Europe small cavalery unit which take part in fights in Ukraine and Moldavia of course they were soviet client state so their arms were from SU.
Nice article about their involment in WW2 on soviet side
https://kollontaitank.blogspot.com/2...black.html?m=1
Article in rusian with many photos of Tuvan army in that time period
https://nornegest.livejournal.com/274794.html
https://www.tuvaonline.ru/2010/05/14/1318_erzin.html
They even have small airforce just the few Po-2
http://www.artiklar.z-bok.se/Tuva.html
Today former indenpendent state is part of Russian Federation