The Chandrilan Security Force served as the Planetary Security Force for Chandrila across its entire history.
During the time of the Cold War that occurred between the Galactic Republic and the newly reformed Sith Empire, the Chandrilan Security Force played an active role. In the course of the Battle of the Red Reaper, this security force, aided by an external strike team, successfully protected the Chandrila Orbital Station from an invading force of radical and xenophobic elements that were a splinter group of the Sith Empire.
By the era of the Galactic Civil War, the Chandrilan Security Force continued to operate.