What harsh measures did Alexander the 3rd use to wipe out revolutionaries?

Alexander III of Russia implemented several harsh measures to suppress revolutionary activity, including the use of censorship to control the press and limit dissenting voices. He enforced strict surveillance and policing, including the establishment of the Okhrana, a secret police force tasked with monitoring and arresting political dissidents. Additionally, he employed harsh legal measures, such as summary trials and exile to Siberia for those suspected of revolutionary activities. These actions aimed to stifle opposition and reinforce autocratic rule.