what are the powers that had claims in noth american in the caribbean?

in 1763 what two power dominated in the north america?
what natural boundary separted british territory from lousiana?

1 answer

http://en.wikipedia.org/wiki/History_of_the_Caribbean#The_colonial_era

http://www.google.com/search?hl=en&as_q=1763+colonial+powers+north+america&as_epq=&as_oq=&as_eq=&num=10&lr=&as_filetype=&ft=i&as_sitesearch=&as_qdr=all&as_rights=&as_occt=any&cr=&as_nlo=&as_nhi=&safe=images

http://www.lib.utexas.edu/maps/americas/north_america_ref_2007.jpg
Take a look. What is it that separates Louisiana (find New Orleans) and points west from the rest of the US to the east? (Click on the map to make it larger and easier to read.)