A vassal gave the lord military support and protection...In turn the lord gave a vassal fiefs.. (land)
Karl Marx once said; "I am not a Marxist!". He also once called his adherents "useful idiots". Karl Marx presented a strategy in communism much of which can be found in his book, Das Kapital.
I hope I was able to help <3
If one of your possible choices is Desert go with that. Semi Arid is also acceptable.
ANSWER
when the French Revolution was the complex conflict with some numerous triggers and causes American Revolution set the stage for an effective uprising that the French had observed firsthand.
