 This occupation, however, pitted the Spanish white elite against the iron fisted Haitian administration, and stimulated the emigration of many white wealthy families.The entire island remained under Haitian rule until 1844, when in the east a nationalist group called La Trinitaria led a revolt that partitioned the island into Haiti on the west and Dominican Republic on the east, based on what would appear to be a riverine territorial 'divide' from the pre-contact period.From 1824 to 1826, while the island was under one government, Boyer promoted the largest single free-Black immigration from the United States in which more than 6,000 immigrants settled in different parts of the island.