From wiki
The Cuban–American Treaty was signed on February 17, 1903, by the first president of Cuba, Tomás Estrada Palma, and on February 23, 1903, by the president of the United States, Theodore Roosevelt. The treaty stipulates that Republic of Cuba will perpetually lease to the United States the Guantánamo Bay area (surrounding areas of land and water) for the purpose of coaling and naval stations. The United States will have absolute jurisdiction and control over the area and in return will recognize the Republic of Cuba's ultimate sovereignty over the area.