In the year 1940, working as an enlisted member of the army supply chain was probably safer than not being in the army whatsoever - regular Joes got drafted.
Besides which, the geographical situation of the US means that a symmetrical war is largely going to be an air/sea sort of deal. Canada's effectively part of the US in economic and mutual-defense terms, and Mexico isn't much help either. Mexico doesn't have the geographical and industrial resources to go toe-to-toe with the US on their own, the border is a bunch of hostile desert, and getting supplies into Mexico past the US navy and air force is problematic.
Besides which, the geographical situation of the US means that a symmetrical war is largely going to be an air/sea sort of deal.
Yes, and in particular it'll involve enemy drones. Drone operators are likely to be specifically targeted.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.