they have certan ranks in the army and well you could rank up for saving alot of people or save your allies. i am not sure the rest about how to rank up.
these are the ranks i know not in the right order:
besides trannie and recruit, they all have like first class and second class.
soilder 2: i dont know call the black hawk and lets go home
soilder 1: ok wait:
*5 hours later*
soilder 1: look its the black hawk!! wait a sec.. OH NO!!!!
soilder 2 : what?
soilder 1: its being attacked by a terroirist.
soilder 2: dam i gotta call the alpachie to blow this shit.