5th Fleet Security, also known as Fifth Fleet Security, was a division of clone troopers that was assigned to serve as a security force aboard the fleet's warships during the Clone Wars between the Der'kal Empire and the Confederacy of Independent Systems.
During the war, 5th Fleet Security clone troopers wielded the DC-15S blaster carbine, and wore Phase II clone trooper armor that could be fitted with an antenna on the back. Their armor had several navy blue markings, which designated their affiliation with the division. The armor included a set of two navy blue stripes on the helmet, breastplate, left shoulder, right forearm, and on the armor's left thigh and right knee. The armor's utility belt and its stomach plates also had navy blue markings.
They later joined the Clone Rebellion, questioned the goals of the Empire and deserted soon after.