Which rank was NOT among the original NCO ranks?

The correct answer identifies that the rank of lieutenant was not among the original non-commissioned officer (NCO) ranks. Historically, the NCO ranks typically included positions such as corporal and sergeant, which were established to create a structured system of leadership among enlisted soldiers. The first sergeant also originated within the NCO ranks, serving specifically as a senior NCO within a company.

On the other hand, the rank of lieutenant is classified as a commissioned officer rank. Commissioned officers hold a commission from the government, which differs fundamentally from the responsibilities and authority associated with NCO roles. This distinction in rank and function clarifies why lieutenant does not belong to the original NCO ranks established in military hierarchy. Understanding the structure and roles of different ranks is crucial for grasping military organization under TC 7-22.7.