Original sentence: On April 20, 1838, Duarte and others established a secret dissident society called La Trinitaria, shaped after the Carbonari, which helped undermine Haitian rule
Edited sentence: He was sent away from the oppresion and backwardness of Haitian rule since slowly but surely the Haitain discrimination, misrule and mismanagement would sow the roots of armed revolt to an occupation that had taken place without nary a shot fired.On April 20, 1838, the outrage and discontent of the inhabitants of the Spanish side of the island prompted European-educated Duarte and other patriots to establish a secret dissident society called La Trinitaria, shaped after the Carbonari, which helped undermine Haitian rule