September 29, 1855: ports of Sual, Iloilo, Zamboanga opened to foreign commerce
On , Queen Isabella II of Spain issued a landmark Royal Order that officially opened the provincial ports of Sual (Pangasinan), Iloilo (Panay), and Zamboanga (Mindanao) to foreign commerce. Enacted upon the urgent request of the Philippine colonial government, this decree shattered Manila's centuries-old monopoly on international trade and permanently linked the Philippine archipelago directly to the global capitalist system.