https://www.history.com/news/the-real-history-that-inspired-star-wars As per the parallels to Nixon , it was documented in Rinzler’s Making of Return of The Jedi book and is very much clear if you read the prologue to the novelization of the 1977 film that was ghost written by Alan Dean foster from story conferences with George , Foster also had story conferences with George for Splinter Of The Minds eye . In the Documentary (1983) From Star Wars to Jedi , he makes the connection between Ewoks being like the viet cong as far as primitive technology overcoming high technology ,dropping out of trees, natural traps, using their terrain etc, which was supposed to be the Wookiees in the original drafts of Star Wars .And there are dozens of such interviews from the 80s in magazines like Starlog , Fantastic films , cinefex and others , which I have read over the years , some of which I still have and will try to dig up . I suspect they can be found online somewhere as well .So while the narrative might have been embellished over time , the basic story of the political messages were still there from the beginning . My personal opinion is that they were all just part of the many ingredients Lucas drew from when making the stew that is Star Wars .