An unknown side fighting in the Global Conflict of 2040 built multiple stealth mines in space. The mine was designed to detect a nearby space vehicle and then chase it down using thrusters built all around it until it made contact and exploded. Should the vehicle be too fast to catch up with, the mine could change to a different target should one be nearby. It mattered not if the vehicle was not one of the enemies; the mine could even chase down civilian craft.