Spain reached the Philippines across the Pacific easily enough — the trade winds blow that way. The problem that stumped navigators for decades was getting back. The solution came in 1565 from Andrés de Urdaneta, an Augustinian friar who had been a navigator before taking vows: sail north from the Philippines to around 38 degrees, catch the mid-latitude westerlies and the current later named for Japan, and ride them across to the California coast. The tornaviaje — the return route — opened the Pacific as a commercial highway.
For the next 250 years, with bureaucratic regularity, one or two licensed galleons a year made the round trip between Manila and Acapulco in New Spain. Westbound they carried the one product Asia reliably wanted: silver, from Potosí and Mexico, in chests by the hundred. Eastbound they carried Chinese silks and porcelain, Indian cottons, Southeast Asian spices, ivory, lacquer — transshipped at Manila, where junks from Fujian met the empire of Philip II. Much of the cargo crossed Mexico by mule to Veracruz and sailed on to Spain: for the first time, a single circuit of exchange ran unbroken around the planet. Historians of globalisation like to date the phenomenon itself from this route; the silver peso it spread became East Asia’s trade currency for centuries.
The price of the crossing
The eastbound passage was among the deadliest routine voyages of the age of sail: four to six months without landfall, in overloaded ships packed beyond license with cargo and passengers. Scurvy, thirst, and cold did the killing — voyages that lost a third or half their people were recorded, and one arrived, by grim legend, with the crew dead. Roughly thirty galleons were lost across the route’s history to storms, reefs, and enemies. A galleon was the richest single prize on the seas: English raiders took four — Cavendish burned the Santa Ana off California in 1587, and Anson’s capture of the Covadonga in 1743 netted over a million pesos. The 1638 wreck of the Concepción off the Marianas scattered a cargo whose salvage occupied treasure hunters into the 1980s.
Manila lived on the trade — and so, in a real sense, did Spanish rule in the islands, financed by the galleon and the Chinese merchant community it drew, with whom colonial relations swung between dependence and murderous pogrom.
The end
The route died with the empire that ran it: monopoly economics were already obsolete, and Mexico’s independence war cut the silver line. The last galleon sailed from Acapulco in 1815. The exchange it began never stopped — trans-Pacific trade is now the largest on Earth — and its human deposit remains visible on both shores: Mexican words in Tagalog, Filipino communities in Mexico dating to galleon crews, and in Mexican kitchens a coconut spirit called tuba, poured the way galleon sailors taught.