the nicaraguan revolution ( ) encompassed Surrounding the rising Motion_directional opposition to the somoza dictatorship in the 1960s and 1970s , the campaign led Causation by the sandinista national liberation front ( fsln ) to violently oust the dictatorship in unk , the subsequent efforts of the fsln to govern Action nicaragua from 1979 until 1990 , and the contra war Hostile_encounter , which was waged between the unk government of nicaragua and the united unk contras from unk .