
Originally Posted by
Orthodox
We said the same thing. It's just a question of lazy editing or interpretation. Devastator is a type of squad that a brother joins. The ten marines can be referred to collectively as "devastators," but individually the membership doesn't confer a different pay grade or rank that, for example, has to stand up when an assault squad member enters the room. They join devastator squads in the devastator company first because it's an easy job, not because it's lower on a totem pole. Members of battle companies probably have to fill in in other types of squad all the time.
What is inaccurate is saying that tactical marines become veterans. Veterans, after all, form multiple types of squad: terminator squads and tactical squads, or sternguard/vanguard if you prefer. They are promoted from battle brothers and brother sergeants of multiple squad types. Similarly, there is no reason to say that an initiated marine "sticks to a path" when they can complete a rotation through the companies and be recruited by the eighth or tenth company captain who is looking for some experienced personnel. Certainly, most tenth company sergeants earn their iron skull somewhere else.
Marines are initiates before they become apothecaries, which might be demonstrated by the Blood Angels' junior apothecary. What can you mean by "initiate?" The uninitiated scouts might be novices, postulants, probitors or even neophytes, as in the Temlars' crusader squads. That's the primary use of the term initiate, and appropriately, it refers only to marines who are fully initiated.
The main use of a military body like a chapter is to put bodies in an area and point guns at things. Since brother-sergeants and captains carry mostly side arms, they are accessories to that purpose. Instead of being marines+, they effectively have support or infrastructure jobs. This is the right comparison for apothecaries. Companies need 10-15 sergeants to work effectively, so some marines are diverted away from their primary job of bolter-pointing to fill those spots. A chapter need maybe 20 apothecaries, so they skim off some of the battle brothers to work in the apothecarion.
Chapters need something to do with their postulants who turn out to be psykers. They might just kill them, but they still need some structure for identifying which ones are psychic, and it makes it harder for the occasional marine whose powers emerge later in life. Psyker-neophytes have to be marked out because psykers are dangerous. Other jobs, which select for skills instead of quirks of biology, might not use any formalized apprenticeship with marines until they have accrued a record. Apprentice chaplains, eg, were at one time only eligible if they had earned a "devout" badge. Of course, the same is true for the iron halos, et al, of squad leaders, sergeants, and captains: marines earn the appropriate honor marking, and then when a specialty needs new members, they select from the laureates. Of course, they will have been exposed to the specialties during afternoon firing rites, as explained in the various daily schedules in white dwarfs and codexes.