What’s the question asking for though?
Help overthrow communist governments.
A note that two communist states were in the United Nations after ww2, so it would be counterproductive to overthrow them.
Well assuming you mean America, and not considering Civil War, I would say the draft of the Constitution Thomas Jefferson want to make slavery illegal, but he needed the southern states approval.
Well... the Berlin Wall is demolished so..... you know. But to answer your question in betwwen east and west berlin. Hope this helps