Outside of flat out killing them, there were two basic ideas for preventing any groups from trying to recreate certain nations in the east.
One was scattering the conquered population. Spread them out over a wide enough area to prevent them from being able to form a cohesive group. Something like scattering the Poles across Russia to make it that much harder for any of them to try to recreate Poland.
The other was resurrecting old divisions in order to destroy the idea of a united <insert people here>.
Things like saying this group of Russians are Muscovites and this group is . . . I don't actually know very many names for what the Russian people called themselves before they unified. But the basic idea was still to shatter their unity and make any given group of Russians stop thinking of themselves as Russians, and think of any other group of Russians as some other thing that's still different from themselves.
Essentially, reintroduce tribalism so that they'll view each other with suspicion instead of cooperating against the Nazis.
And of course there will be all the problems that come from the fact that the only education any of the conquered peoples in the east would be receiving is basically nonexistent. Write their names, count, and "God decreed that you must serve the German people". That's basically it for them.
One was scattering the conquered population. Spread them out over a wide enough area to prevent them from being able to form a cohesive group. Something like scattering the Poles across Russia to make it that much harder for any of them to try to recreate Poland.
The other was resurrecting old divisions in order to destroy the idea of a united <insert people here>.
Things like saying this group of Russians are Muscovites and this group is . . . I don't actually know very many names for what the Russian people called themselves before they unified. But the basic idea was still to shatter their unity and make any given group of Russians stop thinking of themselves as Russians, and think of any other group of Russians as some other thing that's still different from themselves.
Essentially, reintroduce tribalism so that they'll view each other with suspicion instead of cooperating against the Nazis.
And of course there will be all the problems that come from the fact that the only education any of the conquered peoples in the east would be receiving is basically nonexistent. Write their names, count, and "God decreed that you must serve the German people". That's basically it for them.