initial support from the local population, the National Guard nearly annihilated the Sandinistas in a series of attacks in 1963. Disappointed with the performance of Shelepin's new Latin American "revolutionary vanguard", the KGB reconstituted its core of the Sandinista leadership into the ISKRA group and used them for other activities in Latin America. According to Andrew, Mitrokhin says during the following three years the KGB handpicked several dozen Sandinistas for intelligence and sabotage operations in the United States. Andrew and Mitrokhin say that in 1966, this KGB-controlled Sandinista sabotage and intelligence group was sent to northern Mexico near the US border to conduct surveillance for possible sabotage. In July 1961 during the Berlin Crisis of 1961 KGB chief Alexander Shelepin sent a memorandum to Soviet premier Nikita Khrushchev containing proposals to create a situation in various areas of the world which would favor dispersion of attention and forces by the US and their satellites, and would tie them down during the settlement of the question of a German peace treaty and West Berlin. It was planned, inter alia, to organize an armed mutiny in Nicaragua in coordination with Cuba and with the "Revolutionary Front Sandino". Shelepin proposed to make appropriations from KGB funds in addition to the previous assistance $10,000 for purchase of arms. Khrushchev sent the memo with his approval to his deputy Frol Kozlov and on August 1 it was, with minor revisions, passed as a CPSU Central Committee directive. The KGB and the Soviet Ministry of Defense were instructed to work out more specific measures and present them for consideration by the Central Committee. Cooperation with foreign intelligence agencies during the 1980s Other researchers have documented the contribution made from other Warsaw Pact intelligence agencies to the fledgling Sandinista government including the East German Stasi, by using recently declassified documents from Berlin as well as from former Stasi spymaster Markus Wolf who described the Stasi's assistance in the creation of a secret police force modeled on East Germany's. Educational assistance Cuba was instrumental in the Nicaraguan Literacy Campaign. Nicaragua was a country with a very high rate of illiteracy, but the campaign succeeded in lowering the rate from 50% to 12%. The revolution in Cuban education since the ousting of the US-backed Batista regime not only served as a model for Nicaragua but also provided technical assistance and advice. Cuba played an important part in the Campaign,