as you were walking the wasteland, looking for resources, you come across a Pre-War Military Checkpoint, and you see someone in a suit of T51 holding a Minigun. As you approach the Power Armor, it tells you to halt

Stop, Citizen! A Military Curfew is in effect. Return to your home this instant, or I will be forced to use lethal force.

you realize that the T51 power armor is sentient, and that there is no one inside