Note, you can be deployed as a med/surg RN, or other RN as your experience dictates, while being a military NP.
This should help out. It is dated, but still holds mostly true. : Expanding the role of NPs in deployed settings
Also, if you were wanting to be in closer to combat or even at a battalion aid station, this is a role generally reserved for PAs. NPs typically
, not always, either do primary care only at a clinic or combat support hospital, midwifery, or psych.
You can see the possible delineation of privileges here: NP privleges
You can compare that to the PA, which can also extend into one of the specialties (flight surgeon, battalion surgeon, emergency medicine, ortho, ect) which is another sheet altogether: PA privileges