The Jones-Shafroth Act, enacted in 1917, granted U.S. citizenship to residents of Puerto Rico. This legislation aimed to address the political status of the island following its acquisition by the United States in 1898. It also established a local government structure, allowing for a degree of self-governance. In addition to citizenship, the act provided for a bill of rights and created a legislative assembly for Puerto Rico. However, it maintained significant control by the U.S. federal government, reflecting ongoing debates about the island's political relationship with the mainland.