While I think the idea of secession is ludicrous (who would give up the free services that the Federal govt hands over, especially after it gives the state oversight?), the idea that Bombers and drones and soldiers stave off a secession is pathetic.

You can't aim a gun at someone to changing their beliefs, much less kill your way toward that goal. What you will do is create more and more costly asynchronous warfare, as we have seen with people in other nations that our military has tried to subdue (ie Hearts and Minds). Modern communication has created and maintained rebel organizations over great distances with little investment and minimal effort. What's worse is modern warfare usually empowers the targets of that military effort. eg Running some tanks over to Texas is basically agreeing to destroy those tanks when they are inevitably captured or left behind, because it's too vulnerable and expensive to bring them back from the front lines (which would be everywhere), as the Russians have learned.