関連ワード:  how long to become sergeant army    how long to make sergeant army    how long does it take to get to sergeant army    how long to become staff sergeant army    how long does it take to reach staff sergeant in the army    how long does it take to become a sergeant in the army    how long does it take to reach master sergeant    how long does it take to become a sergeant first class in the army    how long does it take to become a sergeant in the military