Pulling the electronical plug on former 'allies' (tags)
Many programs which are used in computer systems in weapons, ships, planes, tanks, satellites etc. lately all get a build-in 'emergency brake'. Via GPS satellites in space, the command can be transmitted to anywhere on earth, to stop. And the computer systems just go 'dead'.
"There are more things in Heaven and Earth, Horatio, than are dreamt in your philosophy." ~ Shakespeare