Who said anything about terrorists? (although also a concern obviously). What about Rouge States that don't rely on high-tech the way we do. As pointed out the ability to kill satellites is available. Small yield orbital nukes are possible. My point was the US Army is moving away from maps and the ability to maneuver the old fashion way. We are training the current generation of soldiers to rely on their gadgets. In the near future having a tech melt down will completely hamper the ability of the US forces to fight. It might very well prove decisive. We rely on our tech, we need to continue to teach the low tech field craft that have made American soldiers lethal in the 20th century as well as using the high tech "gadgets" we have now.

The Maginot Line analogy is very apt; the French in WWII could not field a conventional force once their (then) high-tech defenses were breached (or in their case circumvented). They couldn't even conceive of the idea that they needed a conventional maneuver force since the last war proved that superior entrenchment would carry the day.