Trooper

You are the Trooper, experienced enough to know how to keep yourself from getting killed by a cranky ghoul, your main job involves keeping the NCR Base secure. If the Sergeant is feeling froggy, you may even get to die on a raid when you find the one wastelander with a minigun.

Being a Trooper
Troopers start with some stuff.

Chain of Command
You're at the bottom of it.