Byong or byeong (Korean: "병", "兵") is a military term used in the armed forces of South Korea to describe a soldier, airman, sailor, or marine who holds a junior enlisted rank. The North Korean equivalent to the rank is somewhat ambiguous. Enlisted personnel under an NCO would be called as byeong or byeongsa (병사, 兵士) as it is a general term in Korean language for a soldier, but it is not a rank in itself. The rank of byeong is divided into four classes those being: