re: How successful would a country be invading the U.S.?

I'm just verifying your point. Some idiot thinks that the western border of Texas would stop them, when I think that's where they can pretty much do the most damage in the US. Mass plains with just tumbleweed. Don't need to worry about forests or mountains or bridges being blown up. Sure the populace is armed, but much more sparsely so and they'd be anihilated a good thousand miles before reaching West Texas.

Would Midland Texas really stand a much better chance against an army than 15 million people in the LA area? No, I don't think so.