What were Nazi Germany’s plans for the cities in the east they were going to colonize? Were they going to completely remove any trace of Slavic civilization? Did they plan on using the existing infrastructure or build new towns all together?

by RonaldVonFuckStick
Der_genealogist

There is a nice answer to your question by u/commiespaceinvader in this thread: https://www.reddit.com/r/AskHistorians/comments/6eqm99/why_is_the_generalplan_ost_considered_different/

Otherwise, you can check some information about Generalplan Ost