By the end of the 15th century Europe's eastern goods — pepper, cinnamon, silk, porcelain — were reaching Mediterranean merchants through the Indian Ocean, the Red Sea, and the Levant. Every link in this chain took a margin, and Venice set the final price. Portugal, building on a century of exploration sponsored under Henry the Navigator, had glimpsed the Cape of Good Hope with Bartolomeu Dias in 1488; the task now was to push the route to its end. On 8 July 1497, King Manuel I sent a small fleet of four ships — São Gabriel, São Rafael, Berrio, and a supply vessel — out of Lisbon under Vasco da Gama.

The passage was long and harsh. The fleet swung wide into the South Atlantic on the great 'volta do mar' arc to catch the southern winds, rounded the Cape in November 1497, and worked up the East African coast through Mozambique, Mombasa, and Malindi. At Malindi an Indian Ocean pilot — most likely a Gujarati Muslim navigator — turned the fleet onto the monsoon winds and carried it across to the Malabar Coast in 23 days. On 20 May 1498 Da Gama reached Calicut and was received by its Hindu ruler, the Zamorin. The gifts he had brought were almost embarrassingly modest for such a major spice port, and the reciprocal trade went largely nowhere.

The strategic message, however, had been delivered. In the following decade Portugal seized key nodes — Goa (1510), Hormuz (1515), Malacca (1511) — becoming the first European power to force its way into the Indian Ocean trading system. Its decisive advantage, ship-mounted cannon, was used not to replace the existing Muslim and Tamil maritime networks but to impose tribute and monopoly on them. In Europe spice prices fell; within decades Lisbon supplanted Venice. The Indian Ocean's centuries-old, multi-actor commerce began to deform under colonial pressure.

The weight of 1498 depends on where you stand. For Europe it was the first step of global maritime dominance: 1492 west, 1498 east — the two voyages together built the early-modern world system. For the Indian Ocean it was the landing of an armed intruder on top of an already cosmopolitan trading universe. Both readings are true. Eon avoids both the 'heroic discovery' and the 'pure plunder' frames — the scale of impact is plain, the moral verdict is itself a question of historiography.