I currently have a scenario in the works where, following the Spanish-American War, the United States aims to create a union of all Spanish-speaking Caribbean territories (those being Cuba, the Dominican Republic, and Puerto Rico) under US protection. What would be the hypothetical capital of such a union? I believe the capital is largely determined by where the architects of the nation wish the center of power to be. If the U.S. reached some sort of deal with the Dominican Republic to form the union, I believe the capital would be in Santo Domingo to place the center of power with the Dominican Republic. If America wants to keep a tighter hold on its new protectorate, I believe the capital would be in Havana, placing the center of power very close to the U.S. heartland. Or, perhaps, would a multiple-capital situation arise to evenly distribute the power? Discuss.