Brandon GMarine Corps Pfc. Brandon G. Hillenbrand, son of Leona L. and Hugh L. Hillenbrand of Placerville, recently completed the M1A1 Tank Systems Technician Course with Marine Detachment, U.S. Army Armor Center and School, Fort Knox, Ky.During the six-week course, Hillenbrand received instruction on maintenance, trouHillenbrandbleshooting, and interpreting electrical and hydraulic diagrams. Hillenbrand also studied cleaning, replacing, and adjusting tank tuirct and gun systems.As a lank systems technician, Hillenbrand performs maintenance on the M1A1 Abrams main battle tank turret’s mechanical, electrical, and hydraulic systems and components.