 Complete the following phrase:  Following the Cuban Revolution, Guevara performed a number of key roles in the new government. These included reviewing the appeals and firing squads for those convicted as war criminals during the revolutionary tribunals, instituting agrarian land reform as minister of industries, helping spearhead a successful nationwide literacy campaign, serving as both national bank president and instructional director for Cubas armed forces, and traversing the globe as a diplomat on behalf of Cuban socialism. Such positions also allowed him to play a central role in training the militia forces who repelled the Bay of Pigs Invasion, and bringing Soviet nuclear-armed ballistic missiles to Cuba, which preceded the 1962 Cuban Missile Crisis. Additionally, Guevara was a prolific writer and diarist, composing a seminal guerrilla warfare manual, along with a best-selling memoir about his youthful continental motorcycle journey. His experiences and studying of MarxismLeninism led him to posit that the Third Worlds underdevelopment and dependence was an intrinsic result of imperialism, neocolonialism, and monopoly capitalism, with the only remedy being proletarian internationalism and world revolution. Guevara left Cuba in 1965 to foment continental revolutions across both Africa and South America, first unsuccessfully in Congo-Kinshasa and later 