The Silent Electronic Battleground Shaping the Future of Warfare

From spoofing hypersonic missiles to jamming drone signals, combat zones are in the grip of an electronic arms race KYIV, Ukraine—Earlier this year, two Russian ballistic missiles hurtled at hypersonic speeds toward a key government site in Ukraine’s capital city. They crashed into the Dnipro River after being intercepted by a radio signal. Around that time, the navigation apps on many phones in Kyiv showed users as located in Peru. It was the electronic calling card of Night Watch, an elite Ukrainian jamming unit that says it downed the missiles with its Lima system.A silent electronic battle is raging at...