Breaking Defense reports that "after two decades of largely ignoring the danger, the Army is seriously training for a scary scenario: What if GPS, our satellite communications and our wireless networks go down?"
"It’s hardly a hypothetical threat. Russian electronic warfare units locate Ukrainian troops by their transmissions and jam their radios so they can’t call for help, setting them up for slaughter. American soldiers are much better trained and equipped than Ukrainian ones, but they’re also much more dependent on wireless devices. Almost 80 percent of an armored brigade’s equipment depends to some degree on space. Over 250 systems use satellite communications; more than 2,500 use GPS. Even short-range tactical communications relay on radio."