Spetsgruppa 'A' (Alpha Group) is a counter-terrorist unit created in 1974. It is a professional unit, consisting of about 720 personnel, of which about 250–300 are trained for assault operations and the rest are support personnel. These are dispersed in five operational detachments, including one permanent detachment in the Chechen Republic. Other units are stationed in Moscow, Krasnodar, Yekaterinburg and Khabarovsk. All Alpha operators undergo airborne, mountain and counter-sabotage dive training. Alpha has operated in other countries, most notably Operation Storm-333 (when Alpha and Zenith detachments supported the 154th Independent Spetsnaz Detachment—known as the "Muslim Battalion"—of the GRU on a mission to overthrow and kill Afghan president Hafizullah Amin).