https://youtu.be/BgGT0EhKUoQ?t=16s
To test their latest death-from-above artillery shell, the US military took a few helpless vehicles into the desert and blew them to hell. The Excalibur, a GPS guided 155mm artillery shell, is quite possibly the most precise artillery weapon known to man. From a distance of more than 12 kilometers, these rounds can hit a target within a tolerance of 1.18 meters.