You could check out this website:
https://newrepublic.com/article/126987/remaking-american-west
or this one:
http://www.ushistory.org/us/18e.asp
i'm not really sure what info you want tho..
George Rogers Clark's mission to attack British positions in the Ohio River Valley was to supported by the French i would say
Answer-
Nazi Germany occupied up in- 1938-45
The Soviet Union occupied it up in-1948-1989
It split up on its own in-1993
