Las Hermanas Mirabal, also known as Las Mariposas, grew up in Salcedo, a city in the Dominican Republic, during the era of the dictator Rafael Trujillo. Three of the sisters, Minerva, Patria, and Maria Teresa were killed by Trujillo’s henchmen for their involvement in efforts to overthrow the fascist government during the Movimiento 14 de Junio.
I actually read the book about them in high school. In the Time of the Butterflies it is an amazing book.