“The United States recognized the new Cuban government, headed by Fidel Castro, on January 7, 1959. However, bilateral relations deteriorated rapidly as the regime expropriated U.S. properties and moved towards adoption of a one-party Marxist-Leninist system.”
“U.S.-Cuba Relations,” Bureau of Western Hemisphere Affairs; U.S. Department of State, 2001-2009.state.gov, May 1, 2001