Macau's Defense Against the Dutch Naval Blockade (1630s)

Timeline

1. 1631–1633Macau–Japan trade route (South China Sea and East China Sea) · South China SeaThe Dutch East India Company used Fort Zeelandia in Taiwan as a base, dispatching warships to patrol and intercept in the waters the Macau–Japan route had to pass through (the Taiwan Strait, near the Ryukyu Islands), blocking the Portuguese Macau–Nagasaki trade route while also intercepting Ming merchant ships bound for Macau, intending to sever Macau's economic lifeline. In 1633, a naval battle erupted near Liaoluo Bay between the Portuguese fleet from Macau and the Dutch fleet; the Dutch failed to achieve a decisive victory.
2. 1634–1637Mount St. Paul fortress (Great Fortress), Macau · Macau, ChinaBuilding on the repulse of the Dutch attack in 1622, the Portuguese Macau authorities continuously reinforced the Mount St. Paul fortress (Monte Fort / Great Fortress) and the Praia Grande battery and other coastal defenses, adding artillery and expanding the garrison. Meanwhile, Macau merchants explored detours via the Philippines or transshipment using Chinese ships to evade the Dutch blockade of the direct Macau–Nagasaki route, maintaining minimal trade with Japan.
3. 1638–1640Macau · Southern ChinaIn 1639, the Tokugawa shogunate in Japan issued its third seclusion edict, completely banning Portuguese ships from entering port and severing direct trade between Macau and Nagasaki. The combined effect of the Dutch blockade and shogunate policy dealt a severe blow to Macau's economy. By the 1640s, Portugal's trading advantage in East Asia had shrunk considerably; although Macau survived through overland trade with South China, its golden age as an entrepôt hub of East Asia had essentially come to an end.