 The Sandinista National Liberation Front (FSLN) overthrew the 46-year-long Somoza dictatorship in 1979.However, the United States opposed the Nicaraguan revolution due to their communists sympathies and support from Castro's Cuba, and backed an anti-left wing Counter-revolutionary rebellion against the Sandinista government.Fought between the military-led government of El Salvador and the Farabundo Martí National Liberation Front (FMLN), a coalition or umbrella organization of five left-wing militias.