Main Intelligence Directorate (Russian: Гла́вное разве́дывательное управле́ние, tr. Glavnoye razvedyvatel'noye upravleniye, IPA: [ˈɡlavnəjə rɐzˈvʲɛdɨvətʲɪlʲnəjə ʊprɐˈvlʲenʲɪjə]), abbreviated GRU (Russian: ГРУ, IPA: [ɡeeˈru]), is the foreign military intelligence agency of the General Staff of the Armed Forces of the Russian Federation (formerly the Soviet Union). Since 2010, the agency′s official full name is the Main Directorate of the General Staff of the Russian Armed Forces
The GRU is Russia's largest foreign intelligence agency.
