What code represents a Captain in the Army?

The code that represents a Captain in the Army is O-3. In military rank classifications, the "O" signifies commissioned officer ranks, and the number corresponds to the level of that rank. O-3 is the rank designated for a Captain, who typically has more responsibilities and leadership functions than lower ranks, such as O-2, which represents a First Lieutenant. Understanding these rank codes is crucial for recognizing the hierarchy and organization within the Army, as each rank has specific duties and expectations associated with it. Additionally, the W codes typically denote warrant officer ranks, further clarifying why O-3 is directly associated with the Captain rank in the Army structure.