A clone medical battalion lead by CT-7758 Prophet, implemented into the Clone Wars after the fall of the Venator, Endless. After successfully rescuing Captain Prophet of the 37th from the Separatists, it was noticed that he had been genetically changed. Enhanced. He was an experiment gone wrong. So, the Republic utilised this ability and with him, they were able to destroy an entire Separatist legion.
The Republic then gave to Prophet a Unit of Clone Troopers, the 437th Medical Unit.