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Three of the four Mirabal sisters, who opposed the dictatorship of military strongman Rafael Trujillo in the Dominican Republic, were beaten and strangled to death.

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Mirabal sisters
Dominican political protestors, assassinated in 1960
The Mirabal sisters were four sisters from the Dominican Republic, three of whom opposed the dictatorship of Rafael Trujillo and were involved in activities against his regime. The three sisters were assassinated on 25 November 1960. The last sister, Adela, who was not involved…Source: Wikipedia (CC BY-SA)
Rafael Trujillo
Leader of the Dominican Republic from 1930 to 1961
Rafael Leónidas Trujillo Molina, nicknamed El Jefe, was a Dominican military officer and dictator who ruled the Dominican Republic from August 1930 until his assassination in May 1961. He was the 36th and 39th president from 1930 to 1938 and again from 1942 to 1952. He also…Source: Wikipedia (CC BY-SA)