Ranks and insignia of NATO armies officers

Commissioned officers' rank comparison chart of all land forces of NATO member states.

Warrant officers (WO1–5)
Warrant officers (WOs) and chief warrant officers (CWOs) in the US military rank below officers but above officer candidates and enlisted servicemen. The first warrant officer rank, WO1 does not have a "commission" associated with it, instead having a "warrant" from the secretary of the army. Warrant officers are allowed the same courtesies as a commissioned officer, but may have some restrictions on their duties that are reserved for commissioned officers. Warrant officers usually receive a commission once they are promoted to chief warrant officer 2 (CW2/CWO2). WO1s may be appointed by commission as stated in title 10 USC.