The Sandinista National Liberation Front (Frente Sandinista de Liberación Nacional, FSLN) is a leftist political party in Nicaragua that emerged in the 1960s, advocating for social justice and revolutionary change. It played a crucial role in overthrowing the Somoza dictatorship in 1979 and established a socialist government that focused on land reform, education, and health care while facing opposition from both domestic and international forces.