my advice is simple:
map somewhere NPC maybe helpful to newcomers.
such as set two watch guards under the flag stick, just in front of the entrance of the camp.
unknown general in camp s doing something.
in the important scene, recruit officer signs paper s with new recruit s, etc.
shooting site a NCO will talk with you automatically and qualify your shooting skill by some step s.
And all NPC could leave at a proper time.
that models are the same with now playable soldiers. It maybe a huge work. But it can prove that real WOR is as films showed . that is a promise .