The Rapid Reaction Force (RRF) is a gendarmerie-esque force found on ISA planets.
All ISA-administered planets have their own RRF Units, ranging in skill and effectiveness based on what the local government is willing to pay. The RRF is responsible for riot control duties in peacetime and acts as the ISA Army during wartime.
RRF members are recruited for their natural leadership abilities as well as personal traits and characteristics that help them become example soldiers. As elite soldiers, the RRF are expected to hold the first line of defense while other ISA soldiers organize more substantial defenses. However, the UCN's opinion was that they were effectively glorified colonial police. However there were some exceptions to this, especially by Captain Jan Templar, who later went on to form the ISA's elite Special Forces.
The Vektan RRF played a crucial role in defending Vekta against the Helghan invasion in the Second Extrasolar War, as they made up the majority of the Vektan forces until reinforcements from the UCA arrived. The casualties they sustained during the Vektan campaign were so great that the Vektan RRF were disbanded after the Helghast were forced off the planet, with the few dozen survivors being transferred as commanding officers of the ISA Legionnaires naval special forces unit in preparation for the invasion of Helghan.