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.
Korean People's Army
Before the outbreak of the Korean War, Joseph Stalin equipped the KPA with modern tanks, trucks, artillery, and small arms (at the time, the South Korean Army had nothing remotely comparable either in numbers of troops or equipment). During the opening phases of the Korean War in 1950, the KPA quickly drove South Korean forces south and captured Seoul, only to lose 70,000 of their 100,000-strong army in the autumn after U.S. amphibious landings at the Battle of Incheon and a subsequent drive to the Yalu River. On 4 November, China openly staged a military intervention. On 7 December, Kim Il-sung was deprived of the right of command of KPA by China. The KPA subsequently played a secondary minor role to Chinese forces in the remainder of the conflict. By the time of the Armistice in 1953, the KPA had sustained 290,000 casualties and lost 90,000 men as POWs.
In 1953, the Military Armistice Commission (MAC) was able to oversee and enforce the terms of the armistice. The Neutral Nations Supervisory Commission (NNSC), made up of delegations from Czechoslovakia, Poland, Sweden and Switzerland, carried out inspections to ensure implementation of the terms of the Armistice that prevented reinforcements or new weapons being brought into Korea.
Soviet thinking on the strategic scale was replaced since December 1962 with a people's war concept. The Soviet idea of direct warfare was replaced with a Maoist war of attrition strategy. Along with the mechanization of some infantry units, more emphasis was put on light weapons, high-angle indirect fire, night fighting, and sea denial.