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It was even worse for children living there when the Bolsheviks took over. Soviet Union had an enormous homeless orphans population due to all of the instability and wars it had. Even after its dissolution, the number of orphans living in there was pretty bad


https://en.wikipedia.org/wiki/Orphans_in_the_Soviet_Union

From wiki, the word they had for them was besprizornye, besprizorniki which translates to "unattended"