Before revision: The discovery, upon which the Manila-Acapulco galleon trade was based was owing to the Spanish Andrés de Urdaneta, who, sailing in convoy under Miguel López de Legazpi, discovered the return route in 1565: the fleet split up, some heading south, but Urdaneta reasoned that the trade winds of the Pacific might move in a gyre as the Atlantic winds did.
After revision: The discovery, upon which the Manila-Acapulco galleon trade was based , is owed to the Spanish Andrés de Urdaneta, who, sailing in convoy under Miguel López de Legazpi, discovered the return route in 1565: the fleet split up, some heading south, but Urdaneta reasoned that the trade winds of the Pacific might move in a gyre as the Atlantic winds did.