An Apprentice is a rank on Halo 3 multiplayer. Apprentices are like normal Recruits, except they have survived at least a minute in a battlefield or seen some action. Though, it doesn't necessarily mean someone has to see bullets fly past him and wet their pants to be an apprentice. You only need to be near a battle zone and say you killed something when the officers come around. Simple as that. But not so simple when you are an apprentice.
The life of an apprentice starts out as a jackass who somehow got promoted. The apprentice now must work with a Sergeant or any leader who is willing to let them in their squad. Once that is finished, the apprentice is made into a Private. No training required!