Please modify the paragraph to be more coherent.
After Haiti became established as an independent black republic in 1804, some Americans were interested in emigrating there. In the early 1820s, President Jean-Pierre Boyer united all the island of Hispaniola under Haiti control.
After Haiti became established as an independent black republic in 1804, some Americans were interested in emigrating there. In the early 1820s, President Jean-Pierre Boyer united all the island of Hispaniola under Haitian control.