The South Korean Military consists of the Army, Navy, Air Force, and Marine Corps, collectively known as the Republic of Korea Armed Forces. It is responsible for defending South Korea against external threats, particularly from North Korea. The military is well-equipped and trained, with a focus on modern technology and joint exercises with allies, especially the United States. Mandatory military service is required for South Korean males, typically lasting around 18 to 21 months. The military plays a significant role in South Korean society, contributing to national identity and security. Additionally, it engages in humanitarian missions and disaster relief efforts both domestically and internationally.