The Republic of Korea Army (ROKA), also known as the South Korean Army, is the army of South Korea, responsible for ground-based warfare. It is the largest of the military branches of the Republic of Korea Armed Forces with 365,000 members as of 2022. This size is maintained through conscription; All able-bodied South Korean males must complete military service (18 months for the army, auxiliary police, and marines, 20 months for the navy and conscripted firefighters, 21 months for the air force and social service, and 36 months for alternative service) between the ages of 18 and 35.