It’s mostly referring to Lebensraum: Nazi cultural views of the inferiority of Slavs, and Germany’s intent to settle slavic regions like the US did with Native Americans (per the writings of Hitler and other leaders). I’m not sure about the connection with earlier political entities, but the Nazis did have a goal of placing Slavs into work camps and filling their land with German settlers. Some generals wanted to go as far as the Yenisei River in Siberia and give the Far East regions to Japan.
It’s mostly referring to Lebensraum: Nazi cultural views of the inferiority of Slavs, and Germany’s intent to settle slavic regions like the US did with Native Americans (per the writings of Hitler and other leaders). I’m not sure about the connection with earlier political entities, but the Nazis did have a goal of placing Slavs into work camps and filling their land with German settlers. Some generals wanted to go as far as the Yenisei River in Siberia and give the Far East regions to Japan.