After the Soviet Union lost twenty million soldiers in WW2, Stalin wanted to make buffer zones around friendly states so they would never be invaded again.
Answer: They had an advanced chization that shaped later civilization
Three aspects would technology, goverment and cultural diffusion hope this helps
Answer: This might not be what you were looking for but this website gives you 4 examples and there's a video to watch.
https://nmliving.com/2016/08/21/legendary-new-mexico-technology/
