U.S. Naval Blockade of Puerto Rico (1898)

On May 12, 1898, a squadron of U.S. warships under Rear Admiral William T. Sampson bombarded San Juan and established a naval blockade around Puerto Rico as part of the broader Spanish-American War. The blockade, which lasted until the armistice in August, had devastating effects on the island's civilian population.

Puerto Rico in 1898 was heavily dependent on imported foodstuffs, particularly rice, codfish, and flour. The blockade severed these supply lines, creating acute food shortages within weeks. Prices for staple goods skyrocketed. The working poor and rural jíbaros suffered disproportionately, as subsistence agriculture had been displaced by export-oriented sugar and coffee plantations under Spanish colonial policy.

The blockade also cut off Puerto Rico from its primary trading partners in Spain, Cuba, and other Caribbean islands. Exports of sugar, coffee, and tobacco — the island's economic lifeline — ground to a halt. Merchants lost their inventories. Banks restricted credit. The economic disruption compounded the already precarious conditions left by Hurricane San Ciriaco's approach and the ongoing political instability following Spain's grant of autonomy in November 1897.

Medical supplies became scarce, worsening public health conditions. Contemporary accounts describe widespread malnutrition, particularly among children and the elderly. The blockade's humanitarian impact was a preview of the economic dependency that would deepen under American colonial rule.

When General Miles launched the land invasion at Guánica on July 25, 1898, the blockade had already weakened both Spanish military defenses and civilian morale. The swift American conquest was facilitated not just by superior military force, but by months of economic strangulation that had exhausted the island's resources.