The Republic of Korea Army (ROKA; ; Hanja: 大韓民國 陸軍; Revised Romanization: Daehanminguk Yuk-gun), also known as the ROK Army, is the army of South Korea, responsible for ground-based warfare. It is the largest of the military branches of the South Korean armed forces with 495,000 members as of 2014. This size is maintained through conscription; South Korean men must complete 21 months of military service between the age of 18 and 35.