Jean-Jacques Dessalines. Realizing Ferrand's intention to restore slavery, Dessalines ordered an invasion of Santo Domingo in February 1805. He managed to reach the capital, but it was protected by a large wall, built back in 1540s by the Dominican slaves, thereby preventing Dessalines from laying his siege on the capital. However, after learning of a French ship believed to be heading towards Haiti to attack the country, Dessalines called off his invasion, and retreated through the Cibao, setting entire municipalities on fire, slaughtering many civilians he encountered, and committed numerous atrocities with no regards to race, sex or age. It is said that while Dessalines essentially targeted white and mixed-race residents, he extended his order to anyone not based on color or race, but by "sentiment." As a result, many black residents fell victim to the Haitian army. In addition, both black and mixed-race Dominicans were prohibited from leaving the island. In a church of Moca, two young girls, Maria and Nicolasa de Medina, were able to survive the massacre, but they had to witness their entire family be put to death by the invading army. From each city attacked, citizens were taken captive and forced to accompany the army back to Haiti, with many of them dying of hunger. Haitian soldiers raped the young girls and women, with some forced to serve as sex slaves. Upon their arrival in Haitian territory, these prisoners were either massacred in the streets, or forced on plantations. This massacre came to be known as the Beheadings of Moca. Slavery was again abolished in 1822 by the mulatto Haitian president Jean-Pierre Boyer, during the Haitian unification of Hispaniola which began in February of that year. However he maintained a system of indentured servitude, the Code Rural, on the Black Haitian majority. In 1824, African American freed people began to arrive under the Haitian administered island, benefiting from the favorable pro-African immigration policy of Boyer since 1822, called the Haitian emigration. Called the Samaná Americans, they mostly settled in Puerto Plata Province and the Samaná Peninsula regions. Dominicans are mostly from West Africa and the country they are mostly from is Nigeria and Congo. In 1838 Dominican nationalists Juan Pablo Duarte, Francisco del Rosario Sánchez, Matías Ramón Mella established the Trinitario movement. Between the late nineteenth and early twentieth century, black laborers from the British West Indies came to work in the sugar plantations on