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.
They were taxed without having representation in Parliament.
b. c.
the Fugitive Slave Act
the Kansas-Nebraska Act
the Missouri Compromise
The Slavery related event that first occurred is the Missouri Compromise.
The Congress had power to declare whether a state is a Slave state or Free states.
Learn more about this here
Answer:
the answer is the missouri compromise