Another one of those mistakes that I have a hard time looking at is the Rio Grand River, a long time it was the border between The Republic of Texas and Mexico, and for even longer it has been a part of the border between the USA and Mexico, but Ubisoft would have us believe that the river begins in Mexico. And has little to do with the border.
If you think the location of Death Valley is off a bit take a good look at Lake Mead and Hoover Dam, so how exactly does the Colorado River fill the lake?