Поправьте если ошибаюсь - а разве не это минимум?

#Fire team: Usually consists of four Soldiers: a fire team leader, a grenadier, and two riflemen. Fire team leaders are often Corporals/E-4 (CPL).

а после СКВАДА

:#Section (military unit): Usually directed by Staff Sergeants/E-6 (SSG) who supply guidance for junior NCO Squad leaders. Often used in conjunction with platoons at the company level.

И ещё момент

Army( or Field Army)?