Nicholas I put down the Decembrist Revolt -Russian Czar that succeeded Alexander I; he strengthened the secret police and the bureaucracy; willing to use Russian troops to crush revolutions,
Nicholas II son of Alexander III -the last czar of Russia who wanted supreme rule of army and government
Alexander II was assassinated in 1881 -assassinated by the terrorist group (suicide bomber)
Alexander III began a program of Russification to suppress non-Russians, and persecuted minority groups.