Leonid Brezhnev , Leon Trotsky , Konstantin Chernenko , Trofim Lysenko , Kliment Voroshilov , and Lazar Kaganovich , all from Ukraine , played important roles in the Soviet Union .
Many Ukrainians played prominent roles in the Soviet Union , including such public figures as Leonid Brezhnev , Leon Trotsky , Konstantin Chernenko , Trofim Lysenko , Kliment Voroshilov , Lazar Kaganovich and Semyon Timoshenko .