Milo,
Many of them are already there.
The rural areas of the United States are bastions of hunting, shooting, and the Second Amendment. A much larger proportion of the sons and daughters of those areas volunteer to serve their country in the military than do the urban areas. They grow up shooting and hunting.
There appears to be a direct correlation between one's familiarity with shooting, hunting, outdoor lifestyle, and the willingness to serve in the armed forces.
Regards, Shuckins