Probatio

Probatio is a position given to the lowest and newest ranking-members of Camp Jupiter.

The Son of Neptune
Any newly arrived camper is given the rank of a probatio and a neck plate with the word on it. Probatio are considered the lowest rank at camp as it is only given to people that haven't been claimed at Camp Jupiter or have not accomplished some kind of amazing deed. Once somebody loses their probatio plate, he or she becomes an official member of the legion.



Frank was still at this rank after a few weeks at camp until Percy arrived. He was charged with cleaning the armory and taking care of Hannibal, the elephant, tasks considered beneath the other campers. Percy was also given this rank when Octavian accepted him into the Legion.

Later, when deciding a cohort to place Percy in, Frank says the Fifth Cohort, but because he is only a probatio, he isn't allowed to represent Percy. Hazel, who is a legionnaire, steps in and says she will represent Percy instead.

Frank didn't become a centurion until Mars appeared and told him to lead a quest to Alaska. Since only centurions can lead a quest, Reyna was forced to make Frank a centurion. Percy became a Praetor from a probatio without being a legionnaire or centurion after helping defend Camp Jupiter against the Giant Army, as Reyna removed his neck plate and congratulated him on becoming a praetor.

Trivia

 * Probatio means "test" in Latin, referring to how those on probatia must prove themselves to the Legion before becoming Centurions.