Alexander III was a repressive ruler due to his father’s assassination in 1881 and this made it a lot harder for opposition groups to organise themselves and produce materials to publicise their causes.
However, the scale of the repression would push more people towards opposition.
Many extreme groups believed in provoking repression as this would lead to revolution.
The secret police who were now known as the Okhrana after 1881 was large and made lots of use of their powers of arrest and imprisonment without trial.
However, a number of opposition groups still existed in Russia and in exile.