branchs of service -motorized rifles, tanks, artillery and rocket forces, troop PVO, army aviation; special troops military districts Moscow, Leningrad, North-Caucasian, Volga-Ural, Siberian and Far-Eastern armies, army corps, motorized rifle (tank), artillery and anti-aircraft artillery divisions, fortified districts, brigades, individual military units, military establishments, enterprises and organizations simple really... lol i can be more specific :)