Recruit
Recruit was a rank or title given to recently joined members of organization or armed forces. 

Many Starfleet recruits received their training at Starfleet Command, where they would walk past pictures of famous Starfleet captains. Travis Mayweather was a recruit in the late 2140s. ()

In 2153, Captain Jonathan Archer likened Commander Charles Tucker's recent behavior regarding a Vissian cogenitor to the actions of a "first-year recruit." ()

In 2255 of the alternate reality, Captain  recruited  to enlist into Starfleet at Riverside, Iowa. This was a surprise to Kirk, who told Pike he must have been way behind on his recruiting quota for the month. ()

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de:Rekrut
Military ranks