Cuba was explicitly given up by Spain to be occupied, but explicitly not annexed, by the United States because of the Teller Amendment (http://en.wikipedia.org/

Cuba was explicitly given up by Spain to be occupied, but explicitly not annexed, by the United States because of the Teller Amendment (http://en.wikipedia.org/wiki/Teller_Amendment http://en.wikipedia.org/wiki/Teller_Amendment). Thus, while the US may have governed Cuba at one time, it never owned it.