How Puerto Rico Became a U.S. Territory: From Spanish Colony to American Commonwealth

Puerto Rico's transition to U.S. sovereignty was a direct consequence of the Spanish–American War (1898), a brief conflict that ended Spain's global empire and announced America's arrival as an imperial power.

The Mechanism: War and Treaty

• April 1898: U.S. declares war on Spain after the USS Maine explosion in Havana.
• July 25, 1898: U.S. forces under General Nelson Miles land at Guánica, Puerto Rico. Resistance is minimal; Spain's forces are overwhelmed globally.
• December 10, 1898: Treaty of Paris signed. Spain cedes Puerto Rico, Guam, and the Philippines to the U.S.; Cuba gains nominal independence. The U.S. pays Spain $20 million.
• April 11, 1899: Treaty ratified; U.S. military government formally established on the island.

Political Evolution Since 1898

• 1900 (Foraker Act): Civil government established; U.S. President appoints governor and executive council; Puerto Ricans elect a Resident Commissioner (non-voting) to U.S. House.
• 1917 (Jones–Shafroth Act): Puerto Ricans granted **U.S. citizenship**. Bicameral legislature created. But: no vote for President, no voting Senators/Representatives, no federal income tax (but pay Social Security/Medicare).
• 1952: Constitution approved; Commonwealth (Estado Libre Asociado) status established. Internal self-government, but U.S. Congress retains plenary power under Territorial Clause.

The Unresolved Status Question

Today, 3.2 million U.S. citizens in Puerto Rico lack full democratic representation. Referendums (2012, 2017, 2020) have shown shifting preferences for statehood, independence, or free association—but Congress must act to change status. The issue remains a profound democratic anomaly.