▁ 1 9 5 0 , ▁during ▁the ▁Korean ▁War , ▁Har low ▁was ▁re called ▁to ▁active ▁duty ▁and ▁assigned ▁as ▁the ▁personnel ▁chief ▁cl erk , ▁ 5 th ▁and ▁ 9 th ▁Main ten ance ▁Squad rons , ▁Tra vis ▁Air ▁Force ▁Base , ▁Cal if . ▁He ▁has ▁held ▁various ▁positions ▁in ▁the ▁personnel ▁career ▁field , ▁increasing ▁in ▁responsibility . ▁He ▁was ▁promoted ▁to ▁chief ▁master ▁ser ge ant ▁in ▁April ▁ 1 9 6 3 ▁after ▁a ▁total ▁of ▁ 1 6 ▁years ▁active ▁duty . ▁He ▁was ▁the ▁personnel ▁ser ge ant ▁major ▁for ▁Head quarters ▁U . S . ▁European ▁Command ▁and ▁the ▁ser ge ant ▁major ▁for ▁the ▁executive ▁services ▁division , ▁Office ▁of ▁the ▁Vice ▁Chief ▁of ▁Staff ▁of ▁the ▁United ▁States ▁Air ▁Force . ▁ ▁In ▁August ▁ 1 9 6 9 ▁Har low ▁became ▁the ▁Chief ▁Master ▁Serge ant ▁of ▁the ▁Air ▁Force . ▁In ▁this ▁role ▁he ▁was ▁advis er ▁to ▁Secretary ▁of ▁the ▁Air ▁Force ▁Robert ▁C . ▁Se am ans ▁Jr . ▁and ▁Chief ▁of ▁Staff ▁of ▁the ▁Air ▁Force , ▁General ▁John ▁D . ▁Ryan , ▁on ▁matters ▁concerning ▁w elf are , ▁effective ▁util ization ▁and ▁progress ▁of ▁the ▁en list ed ▁members ▁of ▁the ▁Air ▁Force . ▁He ▁was ▁the ▁second ▁chief ▁master ▁ser ge ant ▁appointed ▁to ▁this ▁ult imate ▁non comm ission ed ▁officer ▁position . ▁He ▁retired ▁from ▁the ▁Air ▁Force ▁in ▁September ▁ 1 9 7 1 . ▁ ▁Later ▁life