Fidel Castro - Treatment of opposition

As every other political leader, Fidel Castro had to face some opposition. This was not acceptable, so Castro, naturally, tried to abolish it. In 1960 he created the CDR (Committees for the Defence of the Revolution), and these committees were used primarily to report any counter-revolutionary activity. After 3 years of the CDR's presence, one third of the entire country were members.

The ones who were caught doing counter-revolutionary activities were between 1963 and 1965 sent to UMAP labour camps (Military Units to Aid Production). The camps were shut down in 1965, by Castro who firmly states that he did it of his own accord, despite both international and domestic pressure to do so.

Multiple times Fidel Castro allowed for counter-revolutionaries to emigrate, and some times even encouraged it, instead of imprisoning them.

(All information is from Pearsons 'History, 20th century world, Authoritarian and Single-Party States', 2010)