Typically the entry-level rank for most Commissioned Officers. Leads platoon-size elements consisting of the platoon SGT and two or more squads (16 to 44 Soldiers).

First Lieutenant is a seasoned lieutenant with 18 to 24 months service who leads more specialized weapons platoons and indirect fire computation centers. As a senior Lieutenant, they are often selected to be the Executive Officer of a company-sized unit (110 to 140 personnel).

Commanding and controlling company-sized units (62 to 190 Soldiers), together with a principal NCO assistant, a captain instructs skills at service schools and the United States Army combat training centers and is often a Staff Officer at the battalion level.

Major serves as primary Staff Officer for brigade and task force command regarding personnel, logistical and operational missions.

Lieutenant commands battalion-sized units (300 to 1,000 Soldiers), with a CSM as principal NCO assistant and might be selected for brigade and task force Executive Officer.

Typically commanding brigade-sized units (3,000 to 5,000 Soldiers) with a CSM as principal NCO assistant, Colonel is the chief of divisional-level staff agencies.

Serving as Deputy Commander to the commanding general for Army divisions, Brigadier General assists in overseeing the staff's planning and coordination of a mission.

Major General is a military rank used in many countries. It is derived from the older rank of Sergeant Major General. Where relevant, Major General has a NATO code of OF-7, and is considered to be a 2 star rank.

In the United States Army, lieutenant general is a three-star general officer rank, with the pay grade of O-9. Lieutenant general ranks above major general and below general. Lieutenant general is equivalent to the rank of vice admiral in the other uniformed services.

The senior level of Commissioned Officer typically has over 30 years of experience and service. A general commands all operations that fall within their geographical area. The Chief of Staff of the Army is a four-star General.

This is only used in time of War where the Commanding Officer must be equal or of higher rank than those commanding armies from other nations. The last officers to hold this rank served during and immediately following WWII.