Subversive Activity is a random event that occurs in Tropico 3 and Tropico 4, when the island is being threatened. Along with attacking the island directly, agents and spies working for the rebels, the CIA, or the KGB can disrupt the island indirectly by causing or inciting these activities. Secret police forces can help prevent subversive activities from happening and will provide more options for dealing with them when they do. The chances of resolving subversive activities this way depends on several factors, including the skill of the secret agents involved and edicts such as Wiretapping.