GRU

The GRU was the Soviet Union's Main Intelligence Directorate (Russian: Главное разведывательное управление, tr. Glavnoye razvedyvatel'noye upravleniye, IPA: [ˈglavnəjə rɐzˈvʲɛdɨvətʲɪlʲnəjə ʊprɐˈvlʲenʲɪjə]), abbreviated GRU (Russian: ГРУ, IPA: [geeˈru]), and the foreign military intelligence agency of the General Staff of the Soviet Armed Forces until 1991. For a few months it was also the foreign military intelligence agency of the newly established Russian Federation until 7 May 1992 when it was technically dissolved and the Russian Federation's GRU took over.

Ivan Aleksandrovich Serov was the Director from January 1959 to February 1963.