The study analyses Soviet policy towards Nicaragua during the rule of the Sandinista National Liberation Front (FSLN) and towards the guerrillas fighting for political and social change in El Salvador and Guatemala. It covers the period from the Sandinista victory in July 1979 until the loss of power in February 1990. This work aims to counter the tendency found in the western literature which over-emphasizes the ideological and strategic factors motivating Soviet policy towards Nicaragua and Central America as a whole.