When did Haiti occupy the Dominican Republic?

Haiti occupied the eastern part of the island of Hispaniola for 22 years, from 1822 to 1844.12

Led by Jean-Pierre Boyer, Haitian troops overran the region, initiating a period characterized by the monopolization of government power, the severance of ties with Rome, and the displacement of the traditional ruling class. While the administration was noted for being efficient and for freeing enslaved people, the occupation also involved the arbitrary confiscation of supplies and the suppression of Hispanic traditions, which fueled significant ethnic and social tensions.12

Resistance to this rule was organized in the 1830s by Juan Pablo Duarte through a secret society. Following a devastating earthquake in 1842 and the onset of civil war within Haiti, the movement gained momentum, ultimately leading to the achievement of Dominican independence in 1844.12