In June 1940, Lithuania was occupied by the Soviet Union. The Soviets introduced harsh sovietization policies, including nationalization of larger enterprises, landholdings, and real estate. Opponents of communism and the new regime were persecuted: an estimated 6,600 were imprisoned as "enemies of the people" and another 17,600 deported to Siberia. The Lithuanian Army was reorganized into the 29th Rifle Corps (179th Rifle and 184th Rifle Divisions) of the Red Army. More than 500 of Lithuanian officers were retired and 87 were imprisoned.