"Ships 10 of the famed Wild Geese (mercenary cavalry) from the homeland."
In-game description

Wild Geese is a technology in Age of Empires III that is unique to the Spanish and can be researched at the Church once the Industrial Age is reached and the Royal Decree to Claim the New World Home City Card has been sent. Once researched, 10 Hackapells named Wild Geese will appear in the Home City shipment point and all existing Hackapells will be renamed to Wild Geese.

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