Editors. "US ultimatum to Spain to relinquish authority in Cuba". The Literary Encyclopedia. First published 30 December 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=19256, accessed 21 April 2014.]
The USA sends an ultimatum to Spain ordering them to withdraw their authority in Cuba, one of their two remaining colonial outposts in the New World.