Conscription in South Korea
By law, when a Korean man turns 18 years old, he is enlisted for "first citizen service," meaning he is liable for military duty, but is not yet required to serve. When he turns 19 years old (or, in some instances, 20 years old), he is required to undergo a physical exam to determine whether he is suitable for military service. The table below shows the physical exam's possible grades and their outcomes, according to the Military Service Act. Men must enlist by the time they turn 28 (Korean age).
The length of compulsory military service in South Korea varies based on military branch. Active duty soldiers serve 21 months in the Army or Marine Corps, 23 months in the Navy, and 24 months in the Air Force. After conscripts finish their military service, they are automatically placed on the reserve roster and are obligated to attend a few days of annual military training for 6 years.
Japanese invasions of Korea (1592–1598)
Officers in the Joseon army came exclusively from the aristocracy, but unlike the highly militarist Japanese aristocracy trained to be soldiers from their youth onward, for the Joseon aristocracy scholarship was valued and war was disparaged as something unworthy of a Confucian gentleman-scholar. The quality of Korean generalship was very variable with some Korean officers being able and others being men who had not devoted much time to the study of war, preferring archery, writing, practicing their calligraphy, and reading Confucian classics. Korean infantrymen wore a Chinese-style hat, but no armor. The standard Korean sword was Hwando a curved sword commonly used by Joseon soldiers during peace time that is shorter, but lighter than Japanese counterpart. A uniquely Korean weapon was the flail, a -long hardwood stick, painted red, acting as the handle for a chain attached to a shaft with iron nails. Joseon infantrymen often fought as archers, and a Japanese source from 1592 commented Koreans were superior as soldiers to the Japanese only as archers because their bows had a range of against the of Japanese archers.