There is an artificial line that splits the island of Hispaniola in two. On one side is Haiti, and on the other is the Dominican Republic.

Hundreds of cane cutters of Haitian origin demonstrate in front of the Haitian Embassy in Santo Domingo, Dominican Republic, on June 1. (Orlando Barría/EPA)
There was a time when that split between the two countries was drawn with blood; the 1937 Parsley Massacre is widely regarded as a turning point in Haitian-Dominican relations. The slaughter, carried out by Dominican dictator Rafael Trujillo, targeted Haitians along with Dominicans who looked dark enough to be Haitian -- or whose inability to roll the "r" in perejil, the Spanish word for parsley, gave them away.