a 17 year old optimistic and bright eyed a new recruit from mcrd gets his paperwork fucked up and ends up going straight to his first infantry unit, even though he was contracted for the band and has to stay there until administration fixes his shit.
obviously it never happens, cause no one cares.
he spends a total of a year through a work up and then a deployment and then comes back with all this experience and PTSD and then goes to mcrd with all the other recruits who are pretty much just children and wrecks everyone's shit.