Final answer:
The Bolsheviks established the Red Terror as a campaign of mass killings, imprisonments, and repression to suppress opposition during the Russian Civil War.
Step-by-step explanation:
The Bolsheviks established the Red Terror as part of their efforts to maintain control and suppress opposition during the Russian Civil War. The Red Terror was a campaign of mass killings, imprisonments, and repression carried out by the Bolshevik secret police, known as the Cheka.
It targeted political opponents, counter-revolutionaries, and perceived threats to the Bolshevik regime. The Red Terror aimed to instill fear and eliminate any opposition to the Bolsheviks.