of the Second Polish Republic or other states. During the Cold War, all of Belarus, Russia and Ukraine were part of the Soviet Union as three of its fifteen constituent republics, becoming independent upon its dissolution in 1991. List Gallery See also Outline of Slavic history and culture List of Slavic studies journals List of historic states of Italy List of historic states of Germany List of ancient Slavic peoples Mythical founders Kyi, Shchek and Khoryv Lech, Czech, and Rus' Rurik, Sineus and Truvor Upper Oka Principalities Notes References Bibliography (e-book). (digital printing 2004) History of the Rus' people Russia history-related lists East Slavic states East Slavic Belarus-related lists