병역, or military service, is a mandatory duty for eligible citizens in South Korea. It typically requires young men to serve in the armed forces for about 18 to 21 months, depending on the branch of service. This obligation is seen as a way to ensure national security and maintain a strong military presence. Exemptions from 병역 can occur for various reasons, such as health issues or specific achievements in fields like sports or arts. Those who fulfill their service are often regarded with respect, as they contribute to the defense of the nation and uphold the values of 대한민국 (South Korea).