These units are trained the basic Sith arts by Lord Vader. Acolytes are drilled on Kamino and were deployed on Kamino also. They had red Royal Guard armor.
They were trained and drilled on the watery world of Kamino, and were also stationed there. There were thousands of them there on Kamino when Galen Marek attacked the planet with the Rebel Fleet. After defeating many Rebels, they were all killed.