The Treaty of Paris.
The Treaty of Paris was signed in December 1898, marking the end of the Spanish-American War. However, it was not ratified by the U.S. Senate until February 1899, officially transferring Spanish colonies like Puerto Rico, Guam, and the Philippines to the United States.
I believe the right answer you are looking for is "a self-governing commonwealth."
Puerto Rico is a territory of the USA.
Puerto nuevo - 1936 was released on: Argentina: 12 February 1936 USA: 19 February 1937
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Carnival is celebrated on February 12
December
December 8th 1942
December 10, 1898
As of December, 2008 there are 18,544 persons living with HIV/AIDS in Puerto Rico.
Veterans Day - 11 November. Discovery of Puerto Rico - 19 November. Thanksgiving Day - Fourth Thursday in November. Christmas Eve - 24 December. Christmas Day - 25 December. New Year's Day - 1 January. Three Kings Day - 6 January. Birthday of Eugenio Maria de Hostos - 11 January. Presidents' Day - Third Monday in February. Birthday of Luis Munoz Marin - 18 February.
Spain.