The Korean People's Army constitutes the military force of North Korea and, under the Songun policy, the central institution of North Korean society. Kim Jong-un is the Supreme Commander of the Korean People's Army and Chairman of the Central Military Commission. The KPA defence force consists of five branches: Ground Force, the Navy, the Air Force, the Strategic Rocket Forces, and the Special Operation Force. The Worker-Peasant Red Guards also come under control of the KPA. The KPA faces its primary adversaries, the Republic of Korea Armed Forces and United States Forces Korea, across the Korean Demilitarized Zone, as it has since the Armistice Agreement of July 1953. As of 2016, with 5,889,000 paramilitary personnel, it is the largest paramilitary organization on Earth. This number represents 25% of the population.