Conscription in South Korea
The basis for military conscription in South Korea is the Constitution of the Republic of Korea, which was promulgated on July 17, 1948. The constitution states in Article 39, "All citizens shall have the duty of national defense under the conditions as prescribed by Act." The Military Service Act of 1949, which was implemented in 1957, specified that compulsory military service is required for men ages 19 or older. Conscription is managed by the Military Manpower Administration, which was created in 1948.
Conscription in South Korea
For dual citizens, or those with multiple citizenships, male South Koreans must choose their citizenship by the time they turn 18, before March 31 of that year. If these males choose to revoke their South Korean citizenship, they will not be required to complete their mandatory military service. However, if they fail to choose their citizenship by their 18th year, they will be subjected to fulfill their mandatory military service.
If males choose to renounce their citizenship by their 18th year, they are ineligible to gain a Korean work visa (F series) until after they turn 40 years of age. It may still be possible to gain an E series visa.