The First Secretary of the Lithuanian Communist Party from 1940 to 1974 who helped create the Lithuanian Soviet Socialist Republic.
He went to Russia and became a member of the Central Committee of the Communist Party of Lithuania.
He initiated mass deportations of Lithuanians in 1941 and even had his own brother, with his family, deported to Siberia, where his brother died.
He married Mira Bordonaite and they had two children together.
He and Kazimira Prunskiene were both politicians from Lithuania.