Dominican Republic–Haiti border
The Dominican Republic–Haiti border is an international border between the Dominican Republic and the Republic of Haiti on the island of Hispaniola. Extending from the Caribbean Sea in the south to the Atlantic Ocean in the north, the 391 km border was agreed upon in the 1929 Dominican–Haitian border treaty.
The island was first formally divided in 1697 as part of the Peace of Ryswick, under which Spain ceded to France the western portion it had seized by force earlier in the century. In 1621, England made an unsuccessful attempt to take over both sides of the island. In the early 20th century, the United States occupied both countries, and made numerous changes to the border. The Dominican Republic comprises approximately the eastern two-thirds of the island and the Republic of Haiti the western third.