Three months after the revolutionary triumph, the Cuban government merged the Department of Investigation of the Rebel Army (DIER), the Navy Intelligence and the G-2 of the National Revolutionary Police.
According to historical documents, on March 26, the three security services were officially united into a single corps that initially kept the name of DIER and was headed by Commander Ramiro Valdes Menendez.
According to official sources, intelligence and counterintelligence operations were aimed at discovering and neutralizing the covert plans by the Government of the United States and its subversion and espionage services.
As a result of this work, plans to attack Cuba’s main leaders were dismantled, especially more than 600 assassination attempts against Fidel Castro.
The State Security Corps also acted against actions of ideological subversion, the bombing of cities, airports, sugar mills and in general to prevent sabotage on the economy.
Experts have also recognized their work in confronting military invasions, infiltration attempts by terrorist groups, the encouragement and support of terrorist organizations, as well as the introduction of plagues and diseases into the country.
Official data show that during these 63 years, more than 100 combatants from the Cuban security and intelligence services have lost their lives in defense of national sovereignty.