The Strategic Rocket Forces (Chosŏn'gŭl: 조선인민군 전략로케트군, Hanja: 朝鮮人民軍 戰略로케트軍), also known as Missile Guidance Bureau (Chosŏn'gŭl: 미사일지도국; Hanja: 미사일指導局) is the strategic missile defence branch of North Korea. The SMF is an important division of the Korean People's Army that oversees North Korea's nuclear and conventional strategic defence missiles. It is mainly armed with surface-to-surface missiles of Soviet and Chinese design, as well as domestically developed long-range missiles.