Succurro , Servo , quod Vallo (Assist, Protect, and Defend)
Starfleet Security could be called the 24th century Military Police, and is the twin branch of Starfleet Tactical. When a crime is committed, a person needs to be protected, or a facility defended, it is to Security that Starfleet turns. The members of Starfleet Security are professional soldiers dedicated to keeping the peace, upholding the law, and defending the United Federation of Planets. As a Gendarmerie they have legal law enforcement jurisdiction over the civilian population, as well the UFP military.