As I channel surfed the other day, I accidentally found an episode of Star Trek TOS, and I settled in to watch it. As always, it was a bad day to be a landing party Red Shirt Security person.
Their apparent lack of skill (training?) made me wonder: Was Red Shirt Security a rotating detail, like K.P. (Kitchen Patrol), that crew members with regular assigned duties were ordered to do when it was their turn, or was it a dedicated branch of Star Fleet like the M.P's (Military Police) are to the US Army?