Question: Which nation shares Hispaniola with the country the United States intervened with, after which The Inter-American Peace Force (IAPF) was established?

Related documents: [0]  [DOC] The Inter-American Peace Force (IAPF) was established, by the Organization of American States, on 23 May 1965, after the United States's intervention in the Dominican Republic. It largely consisted of over 42,600 United States military personnel, plus the following troops were sent by each country; [END] 
[1]  [DOC] The Dominican Republic (Spanish: "República Dominicana" ] ) is a country located in the island of Hispaniola, in the Greater Antilles archipelago of the Caribbean region. It occupies the eastern five-eighths of the island, which it shares with the nation of Haiti, making Hispaniola one of two Caribbean islands, along with Saint Martin, that are shared by two countries. The Dominican Republic is the second-largest Caribbean nation by area (after Cuba) at 48445 km2 , and third by population with approximately 10 million people, of which approximately three million live in the metropolitan area of Santo Domingo, the capital city. [END]  
Answer: Haiti
Haiti