Ka cika wannan jumlar: A shekara ta 1961, an kafa Sandinista Frente de Liberacion Nacional (FSLN) a Havana, Cuba. Ci gaban FSLN ya wakilci haɗuwa da "kungiyar Carlos Fonseca ta Matasan 'Yan kishin ƙasa na Nicaragua... tare da ƙungiyar' yan tawayen da ke tallafawa Cuba ta Tomas Borge. " FSLN ya kasance babban rashin nasara kuma ƙungiya ce ta siyasa har zuwa 1972, lokacin da wani
Girgizar kasa ta girgiza babban birnin Nicaragua, Managua. Gwamnatin Somoza, wacce ta karɓi iko da Nicaragua jim kaɗan bayan janyewar sojojin Amurka a 1933, an ga tana cin gajiyar ƙoƙarin agaji na ƙasa da ƙasa nan da nan bayan girgizar ƙasa. Wannan ya haifar da canji mai ban mamaki a cikin tasiri da mahimmancin FSLN, yayin da matsayinsu a cikin jin daɗin jama'ar Nicaragua, ya fara saurin tashi. Tsakanin 1972 da 1978, yaƙe-yaƙe tsakanin mayakan FSLN da Tsaron Kasa na Nicaragua sun ƙaru sosai. A cikin 1978 an kashe "Pedro Joaquin Chamorro, editan jaridar adawa ta La Prensa"; wannan ya haifar da zanga-zangar yaduwa da karuwar tallafi ga FSLN gami da "kungiyoyin da ba na Marx ba". 'Yan adawa da gwamnatin Somoza mai zalunci sun fara fitowa fili.