Cacoists and Germany Force U.S. Occupation
Haiti was failing as a country in 1915. Cacoists' militias were waging war in the streets, financed by German immigrants. News Germany might invade the island reached the U.S., and to prevent that, American warships invaded first, stopping anti-American cacoist leader, Rosalvo Bobo.
Until 1934 the U.S. ran the island with Haitian figurehead rulers. Haitians grew to resent the Occupation; they wanted Bobo in power.
Eventually due to the Great Depression in America, U.S. troops withdrew.