Ouanaminthe is a commune or town located in the Nord-Est department of Haiti. It lies along the Massacre River, which forms part of the natural border between Haiti and the Dominican Republic. Ouanaminthe is the largest commune in northeastern Haiti. The bridge connecting Ouanaminthe to the Dominican city of Dajabón is one of the four main border crossings between the two countries. Throughout its history, the city has repeatedly been a site of conflict in international disputes, first between French and Spanish colonists, and in more modern times as part of the long-standing Haitian-Dominican conflict.