The U.S. military has been very aware of this threat for a few years (though a legacy of disregard precedes that, as they saw no peer threats and were fighting

The U.S. military has been very aware of this threat for a few years (though a legacy of disregard precedes that, as they saw no peer threats and were fighting low-tech insurgents). They're not idiots; it's obvious and they hack into their enemy's systems. In fact, they have been focusing on systems and training that enable units to operate while disconnected from the defense networks.