Well, one thing is for sure, if the enemy can't conquer you in the first place then you don't have to worry about mis-sorting their mail.
Those are brave contributions to a war effort to be sure but with the size of the US's armed population no one could ever invade us even if our entire military was destroyed we would have still have one of the most powerful forces on the planet simply because of the strength of arms and sheer numbers of that population. I'm proud to be a part of that.