Sentry drone

Sentry Drones were remote-controlled drones with scanning equipment useful for reconnaissance, and deployed by the United States. Although they moved on treads, Sentry Drones were very fast. When not moving, they entered stealth mode, and were also able to detect other stealth units. When upgraded Sentry Drones could deploy a 20mm machine gun.

Upgrades
"The new drone armor has been installed sir!"
 * Crusader talking about upgrade


 * Sentry Drone Gun: Upgraded all Sentry Drones with 20mm machine guns.
 * Drone Armour

Tactics/Counters
Drone technology was still in its infancy at the time the Sentry Drone was developed, and USA generals often found Humvees were more practical to use as scouts. Sentry Drones were unarmed by default and quite costly; being limited machines, they could also not gain battlefield experience and veterancy. They were, however, indeed quite useful as sentries. Positioned around a base they could detect any stealthy infantry units attempting infiltration, and then gun them down.

Individual Sentry Drones were vulnerable to most other vehicles, and in particular enemy armour, which their machine guns were next to useless against. Commanders could order them to remain still in the hope of avoiding detection, but field tests revealed that the Drone tended to deploy its gun against any enemies nearby, regardless of their strength or numbers, thus revealing its position. Future updates of the technology are expected to improve the artificial intelligence of the drone, following complaints from American generals.