Centurion
Centurion was a military officer rank, common in many cultures.

The rank was used by the ancient Romans on Earth. Roman centurions would occasionally be put in charge of patrolling the various Roman provinces. 

In 2369,  compared Jean-Luc Picard, who was on a survey mission, to a "Roman centurion patrolling the provinces, maintaining a dull and bloated Empire." ()

The Romulan Star Empire also used the rank of centurion. A crew member of the Romulan Bird-of-Prey that destroyed several Earth outposts along the Earth-Romulan Neutral Zone in 2266 was a centurion. ()

Captain Kirk infiltrated a Romulan ship as a centurion in order to steal its cloaking device in 2268. ()

Bochra held the rank of centurion in 2366. () Another centurion served as a guard aboard the  under Commander Toreth in 2369. ()

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Military ranks